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Finding the Fourth Proportional to 658,390,637.80, 987,585,956.70 and 331,873,287.40

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Solution

The fourth proportional to 658,390,637.80, 987,585,956.70 and 331,873,287.40 is: 497,809,931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,390,637.80 : 987,585,956.70 = 331,873,287.40 : x
  2. Step 2: Convert to fraction form
    658,390,637.80/987,585,956.70 = 331,873,287.40/x
  3. Step 3: Cross multiply
    658,390,637.80x = 987,585,956.70 × 331,873,287.40
  4. Step 4: Simplify right side
    658,390,637.80x = 327,753,398,040,103,040
  5. Step 5: Solve for x
    x = 327,753,398,040,103,040/658,390,637.80
  6. Step 6: Final answer
    x = 497,809,931.10

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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.