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Finding the Fourth Proportional to 876,306.60, 1,314,978.30 and 639,052.20

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Solution

The fourth proportional to 876,306.60, 1,314,978.30 and 639,052.20 is: 958,956.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,306.60 : 1,314,978.30 = 639,052.20 : x
  2. Step 2: Convert to fraction form
    876,306.60/1,314,978.30 = 639,052.20/x
  3. Step 3: Cross multiply
    876,306.60x = 1,314,978.30 × 639,052.20
  4. Step 4: Simplify right side
    876,306.60x = 840,339,775,567.26
  5. Step 5: Solve for x
    x = 840,339,775,567.26/876,306.60
  6. Step 6: Final answer
    x = 958,956.35

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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.