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Finding the Fourth Proportional to 721,880.60, 1,082,820.90 and 674,641.40

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Solution

The fourth proportional to 721,880.60, 1,082,820.90 and 674,641.40 is: 1,011,962.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,880.60 : 1,082,820.90 = 674,641.40 : x
  2. Step 2: Convert to fraction form
    721,880.60/1,082,820.90 = 674,641.40/x
  3. Step 3: Cross multiply
    721,880.60x = 1,082,820.90 × 674,641.40
  4. Step 4: Simplify right side
    721,880.60x = 730,515,807,925.26
  5. Step 5: Solve for x
    x = 730,515,807,925.26/721,880.60
  6. Step 6: Final answer
    x = 1,011,962.10

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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.