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Finding the Fourth Proportional to 680,686.40, 1,021,029.60 and 491,729.60

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Solution

The fourth proportional to 680,686.40, 1,021,029.60 and 491,729.60 is: 737,594.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,686.40 : 1,021,029.60 = 491,729.60 : x
  2. Step 2: Convert to fraction form
    680,686.40/1,021,029.60 = 491,729.60/x
  3. Step 3: Cross multiply
    680,686.40x = 1,021,029.60 × 491,729.60
  4. Step 4: Simplify right side
    680,686.40x = 502,070,476,796.16
  5. Step 5: Solve for x
    x = 502,070,476,796.16/680,686.40
  6. Step 6: Final answer
    x = 737,594.40

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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.