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Finding the Fourth Proportional to 927.49, 1,390.17 and 379.02

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Solution

The fourth proportional to 927.49, 1,390.17 and 379.02 is: 568.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.49 : 1,390.17 = 379.02 : x
  2. Step 2: Convert to fraction form
    927.49/1,390.17 = 379.02/x
  3. Step 3: Cross multiply
    927.49x = 1,390.17 × 379.02
  4. Step 4: Simplify right side
    927.49x = 526,902.23
  5. Step 5: Solve for x
    x = 526,902.23/927.49
  6. Step 6: Final answer
    x = 568.09

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1.5x scale

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.