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Finding the Fourth Proportional to 972.26, 1,458.44 and 278.86

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Solution

The fourth proportional to 972.26, 1,458.44 and 278.86 is: 418.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.26 : 1,458.44 = 278.86 : x
  2. Step 2: Convert to fraction form
    972.26/1,458.44 = 278.86/x
  3. Step 3: Cross multiply
    972.26x = 1,458.44 × 278.86
  4. Step 4: Simplify right side
    972.26x = 406,691.89
  5. Step 5: Solve for x
    x = 406,691.89/972.26
  6. Step 6: Final answer
    x = 418.30

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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.