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Finding the Fourth Proportional to 876,691.60, 1,314,940.20 and 718,644.40

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Solution

The fourth proportional to 876,691.60, 1,314,940.20 and 718,644.40 is: 1,077,886.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,691.60 : 1,314,940.20 = 718,644.40 : x
  2. Step 2: Convert to fraction form
    876,691.60/1,314,940.20 = 718,644.40/x
  3. Step 3: Cross multiply
    876,691.60x = 1,314,940.20 × 718,644.40
  4. Step 4: Simplify right side
    876,691.60x = 944,974,411,064.88
  5. Step 5: Solve for x
    x = 944,974,411,064.88/876,691.60
  6. Step 6: Final answer
    x = 1,077,886.92

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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.