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Finding the Fourth Proportional to 924.24, 1,385.64 and 491.16

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Solution

The fourth proportional to 924.24, 1,385.64 and 491.16 is: 736.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.24 : 1,385.64 = 491.16 : x
  2. Step 2: Convert to fraction form
    924.24/1,385.64 = 491.16/x
  3. Step 3: Cross multiply
    924.24x = 1,385.64 × 491.16
  4. Step 4: Simplify right side
    924.24x = 680,570.94
  5. Step 5: Solve for x
    x = 680,570.94/924.24
  6. Step 6: Final answer
    x = 736.36

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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.