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Finding the Fourth Proportional to 907.13, 1,360.96 and 387.17

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Solution

The fourth proportional to 907.13, 1,360.96 and 387.17 is: 580.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.13 : 1,360.96 = 387.17 : x
  2. Step 2: Convert to fraction form
    907.13/1,360.96 = 387.17/x
  3. Step 3: Cross multiply
    907.13x = 1,360.96 × 387.17
  4. Step 4: Simplify right side
    907.13x = 526,930.05
  5. Step 5: Solve for x
    x = 526,930.05/907.13
  6. Step 6: Final answer
    x = 580.88

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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.