Home / 643,857,557.60-965,786,336.40-540,545,427.20

Finding the Fourth Proportional to 643,857,557.60, 965,786,336.40 and 540,545,427.20

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Solution

The fourth proportional to 643,857,557.60, 965,786,336.40 and 540,545,427.20 is: 810,818,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,857,557.60 : 965,786,336.40 = 540,545,427.20 : x
  2. Step 2: Convert to fraction form
    643,857,557.60/965,786,336.40 = 540,545,427.20/x
  3. Step 3: Cross multiply
    643,857,557.60x = 965,786,336.40 × 540,545,427.20
  4. Step 4: Simplify right side
    643,857,557.60x = 522,051,387,793,260,928
  5. Step 5: Solve for x
    x = 522,051,387,793,260,928/643,857,557.60
  6. Step 6: Final answer
    x = 810,818,140.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.