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Finding the Fourth Proportional to 520,897.40, 781,346.10 and 310,772.60

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Solution

The fourth proportional to 520,897.40, 781,346.10 and 310,772.60 is: 466,158.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,897.40 : 781,346.10 = 310,772.60 : x
  2. Step 2: Convert to fraction form
    520,897.40/781,346.10 = 310,772.60/x
  3. Step 3: Cross multiply
    520,897.40x = 781,346.10 × 310,772.60
  4. Step 4: Simplify right side
    520,897.40x = 242,820,958,996.86
  5. Step 5: Solve for x
    x = 242,820,958,996.86/520,897.40
  6. Step 6: Final answer
    x = 466,158.90

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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.