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Finding the Fourth Proportional to 617.72, 926.60 and 559.40

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Solution

The fourth proportional to 617.72, 926.60 and 559.40 is: 839.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.72 : 926.60 = 559.40 : x
  2. Step 2: Convert to fraction form
    617.72/926.60 = 559.40/x
  3. Step 3: Cross multiply
    617.72x = 926.60 × 559.40
  4. Step 4: Simplify right side
    617.72x = 518,332.61
  5. Step 5: Solve for x
    x = 518,332.61/617.72
  6. Step 6: Final answer
    x = 839.11

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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.