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Finding the Fourth Proportional to 972.65, 1,458.96 and 387.62

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Solution

The fourth proportional to 972.65, 1,458.96 and 387.62 is: 581.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.65 : 1,458.96 = 387.62 : x
  2. Step 2: Convert to fraction form
    972.65/1,458.96 = 387.62/x
  3. Step 3: Cross multiply
    972.65x = 1,458.96 × 387.62
  4. Step 4: Simplify right side
    972.65x = 565,522.08
  5. Step 5: Solve for x
    x = 565,522.08/972.65
  6. Step 6: Final answer
    x = 581.42

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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.