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Finding the Fourth Proportional to 615.68, 921.52 and 407.52

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Solution

The fourth proportional to 615.68, 921.52 and 407.52 is: 609.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.68 : 921.52 = 407.52 : x
  2. Step 2: Convert to fraction form
    615.68/921.52 = 407.52/x
  3. Step 3: Cross multiply
    615.68x = 921.52 × 407.52
  4. Step 4: Simplify right side
    615.68x = 375,537.83
  5. Step 5: Solve for x
    x = 375,537.83/615.68
  6. Step 6: Final answer
    x = 609.96

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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.