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Finding the Fourth Proportional to 664,686.60, 997,029.90 and 398,747.40

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Solution

The fourth proportional to 664,686.60, 997,029.90 and 398,747.40 is: 598,121.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,686.60 : 997,029.90 = 398,747.40 : x
  2. Step 2: Convert to fraction form
    664,686.60/997,029.90 = 398,747.40/x
  3. Step 3: Cross multiply
    664,686.60x = 997,029.90 × 398,747.40
  4. Step 4: Simplify right side
    664,686.60x = 397,563,080,347.26
  5. Step 5: Solve for x
    x = 397,563,080,347.26/664,686.60
  6. Step 6: Final answer
    x = 598,121.10

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Similar ratio
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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.