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Finding the Fourth Proportional to 891,769,662.60, 1,337,654,493.90 and 687,696,318.60

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Solution

The fourth proportional to 891,769,662.60, 1,337,654,493.90 and 687,696,318.60 is: 1,031,544,477.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,769,662.60 : 1,337,654,493.90 = 687,696,318.60 : x
  2. Step 2: Convert to fraction form
    891,769,662.60/1,337,654,493.90 = 687,696,318.60/x
  3. Step 3: Cross multiply
    891,769,662.60x = 1,337,654,493.90 × 687,696,318.60
  4. Step 4: Simplify right side
    891,769,662.60x = 919,900,071,013,776,256
  5. Step 5: Solve for x
    x = 919,900,071,013,776,256/891,769,662.60
  6. Step 6: Final answer
    x = 1,031,544,477.90

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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.