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Finding the Fourth Proportional to 438,432.80, 657,649.20 and 225,856.40

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Solution

The fourth proportional to 438,432.80, 657,649.20 and 225,856.40 is: 338,784.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,432.80 : 657,649.20 = 225,856.40 : x
  2. Step 2: Convert to fraction form
    438,432.80/657,649.20 = 225,856.40/x
  3. Step 3: Cross multiply
    438,432.80x = 657,649.20 × 225,856.40
  4. Step 4: Simplify right side
    438,432.80x = 148,534,280,774.88
  5. Step 5: Solve for x
    x = 148,534,280,774.88/438,432.80
  6. Step 6: Final answer
    x = 338,784.60

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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.