Home / 391,009,985.20-587,141,665.80-310,897,140.40

Finding the Fourth Proportional to 391,009,985.20, 587,141,665.80 and 310,897,140.40

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Solution

The fourth proportional to 391,009,985.20, 587,141,665.80 and 310,897,140.40 is: 466,843,998.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,009,985.20 : 587,141,665.80 = 310,897,140.40 : x
  2. Step 2: Convert to fraction form
    391,009,985.20/587,141,665.80 = 310,897,140.40/x
  3. Step 3: Cross multiply
    391,009,985.20x = 587,141,665.80 × 310,897,140.40
  4. Step 4: Simplify right side
    391,009,985.20x = 182,540,664,906,912,448
  5. Step 5: Solve for x
    x = 182,540,664,906,912,448/391,009,985.20
  6. Step 6: Final answer
    x = 466,843,998.40

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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.