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Finding the Fourth Proportional to 615.08, 921.59 and 432.15

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Solution

The fourth proportional to 615.08, 921.59 and 432.15 is: 647.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.08 : 921.59 = 432.15 : x
  2. Step 2: Convert to fraction form
    615.08/921.59 = 432.15/x
  3. Step 3: Cross multiply
    615.08x = 921.59 × 432.15
  4. Step 4: Simplify right side
    615.08x = 398,261.12
  5. Step 5: Solve for x
    x = 398,261.12/615.08
  6. Step 6: Final answer
    x = 647.49

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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.