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Finding the Fourth Proportional to 647,525.20, 971,287.80 and 398,347.60

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Solution

The fourth proportional to 647,525.20, 971,287.80 and 398,347.60 is: 597,521.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,525.20 : 971,287.80 = 398,347.60 : x
  2. Step 2: Convert to fraction form
    647,525.20/971,287.80 = 398,347.60/x
  3. Step 3: Cross multiply
    647,525.20x = 971,287.80 × 398,347.60
  4. Step 4: Simplify right side
    647,525.20x = 386,910,164,039.28
  5. Step 5: Solve for x
    x = 386,910,164,039.28/647,525.20
  6. Step 6: Final answer
    x = 597,521.40

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Similar ratio
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1.5x scale

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.