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Finding the Fourth Proportional to 743.64, 1,115.07 and 332.89

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Solution

The fourth proportional to 743.64, 1,115.07 and 332.89 is: 499.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.64 : 1,115.07 = 332.89 : x
  2. Step 2: Convert to fraction form
    743.64/1,115.07 = 332.89/x
  3. Step 3: Cross multiply
    743.64x = 1,115.07 × 332.89
  4. Step 4: Simplify right side
    743.64x = 371,195.65
  5. Step 5: Solve for x
    x = 371,195.65/743.64
  6. Step 6: Final answer
    x = 499.16

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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.