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Finding the Fourth Proportional to 521,721.60, 782,582.40 and 521,721.60

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Solution

The fourth proportional to 521,721.60, 782,582.40 and 521,721.60 is: 782,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,721.60 : 782,582.40 = 521,721.60 : x
  2. Step 2: Convert to fraction form
    521,721.60/782,582.40 = 521,721.60/x
  3. Step 3: Cross multiply
    521,721.60x = 782,582.40 × 521,721.60
  4. Step 4: Simplify right side
    521,721.60x = 408,290,141,859.84
  5. Step 5: Solve for x
    x = 408,290,141,859.84/521,721.60
  6. Step 6: Final answer
    x = 782,582.40

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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.