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Finding the Fourth Proportional to 987,428.60, 1,481,142.90 and 910,446.20

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Solution

The fourth proportional to 987,428.60, 1,481,142.90 and 910,446.20 is: 1,365,669.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,428.60 : 1,481,142.90 = 910,446.20 : x
  2. Step 2: Convert to fraction form
    987,428.60/1,481,142.90 = 910,446.20/x
  3. Step 3: Cross multiply
    987,428.60x = 1,481,142.90 × 910,446.20
  4. Step 4: Simplify right side
    987,428.60x = 1,348,500,924,961.98
  5. Step 5: Solve for x
    x = 1,348,500,924,961.98/987,428.60
  6. Step 6: Final answer
    x = 1,365,669.30

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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.