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Finding the Fourth Proportional to 617.48, 924.80 and 400.40

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Solution

The fourth proportional to 617.48, 924.80 and 400.40 is: 599.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.48 : 924.80 = 400.40 : x
  2. Step 2: Convert to fraction form
    617.48/924.80 = 400.40/x
  3. Step 3: Cross multiply
    617.48x = 924.80 × 400.40
  4. Step 4: Simplify right side
    617.48x = 370,289.92
  5. Step 5: Solve for x
    x = 370,289.92/617.48
  6. Step 6: Final answer
    x = 599.68

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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.