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Finding the Fourth Proportional to 891,769,804.60, 1,337,654,706.90 and 687,696,460.60

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Solution

The fourth proportional to 891,769,804.60, 1,337,654,706.90 and 687,696,460.60 is: 1,031,544,690.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,769,804.60 : 1,337,654,706.90 = 687,696,460.60 : x
  2. Step 2: Convert to fraction form
    891,769,804.60/1,337,654,706.90 = 687,696,460.60/x
  3. Step 3: Cross multiply
    891,769,804.60x = 1,337,654,706.90 × 687,696,460.60
  4. Step 4: Simplify right side
    891,769,804.60x = 919,900,407,440,060,544
  5. Step 5: Solve for x
    x = 919,900,407,440,060,544/891,769,804.60
  6. Step 6: Final answer
    x = 1,031,544,690.90

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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.