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Finding the Fourth Proportional to 617.80, 924.90 and 374.20

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Solution

The fourth proportional to 617.80, 924.90 and 374.20 is: 560.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.80 : 924.90 = 374.20 : x
  2. Step 2: Convert to fraction form
    617.80/924.90 = 374.20/x
  3. Step 3: Cross multiply
    617.80x = 924.90 × 374.20
  4. Step 4: Simplify right side
    617.80x = 346,097.58
  5. Step 5: Solve for x
    x = 346,097.58/617.80
  6. Step 6: Final answer
    x = 560.21

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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.