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Finding the Fourth Proportional to 615.42, 924.03 and 385.29

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Solution

The fourth proportional to 615.42, 924.03 and 385.29 is: 578.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.42 : 924.03 = 385.29 : x
  2. Step 2: Convert to fraction form
    615.42/924.03 = 385.29/x
  3. Step 3: Cross multiply
    615.42x = 924.03 × 385.29
  4. Step 4: Simplify right side
    615.42x = 356,019.52
  5. Step 5: Solve for x
    x = 356,019.52/615.42
  6. Step 6: Final answer
    x = 578.50

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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.