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Finding the Fourth Proportional to 658.04, 907.88 and 392.40

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Solution

The fourth proportional to 658.04, 907.88 and 392.40 is: 541.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.04 : 907.88 = 392.40 : x
  2. Step 2: Convert to fraction form
    658.04/907.88 = 392.40/x
  3. Step 3: Cross multiply
    658.04x = 907.88 × 392.40
  4. Step 4: Simplify right side
    658.04x = 356,250.15
  5. Step 5: Solve for x
    x = 356,250.15/658.04
  6. Step 6: Final answer
    x = 541.38

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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.