Home / 830,401.60-1,245,602.40-643,777.60

Finding the Fourth Proportional to 830,401.60, 1,245,602.40 and 643,777.60

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Solution

The fourth proportional to 830,401.60, 1,245,602.40 and 643,777.60 is: 965,666.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,401.60 : 1,245,602.40 = 643,777.60 : x
  2. Step 2: Convert to fraction form
    830,401.60/1,245,602.40 = 643,777.60/x
  3. Step 3: Cross multiply
    830,401.60x = 1,245,602.40 × 643,777.60
  4. Step 4: Simplify right side
    830,401.60x = 801,890,923,626.24
  5. Step 5: Solve for x
    x = 801,890,923,626.24/830,401.60
  6. Step 6: Final answer
    x = 965,666.40

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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.