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Finding the Fourth Proportional to 391,373,710.80, 586,351,978.20 and 310,027,808.40

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Solution

The fourth proportional to 391,373,710.80, 586,351,978.20 and 310,027,808.40 is: 464,480,402.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,373,710.80 : 586,351,978.20 = 310,027,808.40 : x
  2. Step 2: Convert to fraction form
    391,373,710.80/586,351,978.20 = 310,027,808.40/x
  3. Step 3: Cross multiply
    391,373,710.80x = 586,351,978.20 × 310,027,808.40
  4. Step 4: Simplify right side
    391,373,710.80x = 181,785,418,752,350,592
  5. Step 5: Solve for x
    x = 181,785,418,752,350,592/391,373,710.80
  6. Step 6: Final answer
    x = 464,480,402.58

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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.