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Finding the Fourth Proportional to 847.38, 1,270.74 and 291.93

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Solution

The fourth proportional to 847.38, 1,270.74 and 291.93 is: 437.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.38 : 1,270.74 = 291.93 : x
  2. Step 2: Convert to fraction form
    847.38/1,270.74 = 291.93/x
  3. Step 3: Cross multiply
    847.38x = 1,270.74 × 291.93
  4. Step 4: Simplify right side
    847.38x = 370,963.46
  5. Step 5: Solve for x
    x = 370,963.46/847.38
  6. Step 6: Final answer
    x = 437.78

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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.