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Finding the Fourth Proportional to 907.12, 1,251.64 and 514.04

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Solution

The fourth proportional to 907.12, 1,251.64 and 514.04 is: 709.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.12 : 1,251.64 = 514.04 : x
  2. Step 2: Convert to fraction form
    907.12/1,251.64 = 514.04/x
  3. Step 3: Cross multiply
    907.12x = 1,251.64 × 514.04
  4. Step 4: Simplify right side
    907.12x = 643,393.03
  5. Step 5: Solve for x
    x = 643,393.03/907.12
  6. Step 6: Final answer
    x = 709.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.