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Finding the Fourth Proportional to 891,770,145.60, 1,337,655,218.40 and 687,696,801.60

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Solution

The fourth proportional to 891,770,145.60, 1,337,655,218.40 and 687,696,801.60 is: 1,031,545,202.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,770,145.60 : 1,337,655,218.40 = 687,696,801.60 : x
  2. Step 2: Convert to fraction form
    891,770,145.60/1,337,655,218.40 = 687,696,801.60/x
  3. Step 3: Cross multiply
    891,770,145.60x = 1,337,655,218.40 × 687,696,801.60
  4. Step 4: Simplify right side
    891,770,145.60x = 919,901,215,337,229,568
  5. Step 5: Solve for x
    x = 919,901,215,337,229,568/891,770,145.60
  6. Step 6: Final answer
    x = 1,031,545,202.40

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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.