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Finding the Fourth Proportional to 713,987.92, 1,069,523.88 and 398,612.80

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Solution

The fourth proportional to 713,987.92, 1,069,523.88 and 398,612.80 is: 597,105.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,987.92 : 1,069,523.88 = 398,612.80 : x
  2. Step 2: Convert to fraction form
    713,987.92/1,069,523.88 = 398,612.80/x
  3. Step 3: Cross multiply
    713,987.92x = 1,069,523.88 × 398,612.80
  4. Step 4: Simplify right side
    713,987.92x = 426,325,908,473.66
  5. Step 5: Solve for x
    x = 426,325,908,473.66/713,987.92
  6. Step 6: Final answer
    x = 597,105.21

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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.