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Finding the Fourth Proportional to 672,432.40, 928,007.40 and 386,045.20

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Solution

The fourth proportional to 672,432.40, 928,007.40 and 386,045.20 is: 532,771.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,432.40 : 928,007.40 = 386,045.20 : x
  2. Step 2: Convert to fraction form
    672,432.40/928,007.40 = 386,045.20/x
  3. Step 3: Cross multiply
    672,432.40x = 928,007.40 × 386,045.20
  4. Step 4: Simplify right side
    672,432.40x = 358,252,802,334.48
  5. Step 5: Solve for x
    x = 358,252,802,334.48/672,432.40
  6. Step 6: Final answer
    x = 532,771.48

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Similar ratio
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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.