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Finding the Fourth Proportional to 924.65, 1,387.20 and 376.79

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Solution

The fourth proportional to 924.65, 1,387.20 and 376.79 is: 565.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.65 : 1,387.20 = 376.79 : x
  2. Step 2: Convert to fraction form
    924.65/1,387.20 = 376.79/x
  3. Step 3: Cross multiply
    924.65x = 1,387.20 × 376.79
  4. Step 4: Simplify right side
    924.65x = 522,676.15
  5. Step 5: Solve for x
    x = 522,676.15/924.65
  6. Step 6: Final answer
    x = 565.27

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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.