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Finding the Fourth Proportional to 715,548.28, 987,480.30 and 393,269.80

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Solution

The fourth proportional to 715,548.28, 987,480.30 and 393,269.80 is: 542,725.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,548.28 : 987,480.30 = 393,269.80 : x
  2. Step 2: Convert to fraction form
    715,548.28/987,480.30 = 393,269.80/x
  3. Step 3: Cross multiply
    715,548.28x = 987,480.30 × 393,269.80
  4. Step 4: Simplify right side
    715,548.28x = 388,346,180,084.94
  5. Step 5: Solve for x
    x = 388,346,180,084.94/715,548.28
  6. Step 6: Final answer
    x = 542,725.34

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.