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Finding the Fourth Proportional to 907.12, 1,251.75 and 514.18

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Solution

The fourth proportional to 907.12, 1,251.75 and 514.18 is: 709.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.12 : 1,251.75 = 514.18 : x
  2. Step 2: Convert to fraction form
    907.12/1,251.75 = 514.18/x
  3. Step 3: Cross multiply
    907.12x = 1,251.75 × 514.18
  4. Step 4: Simplify right side
    907.12x = 643,624.82
  5. Step 5: Solve for x
    x = 643,624.82/907.12
  6. Step 6: Final answer
    x = 709.53

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1.5x scale

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.