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Finding the Fourth Proportional to 907.35, 1,251.63 and 534.21

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Solution

The fourth proportional to 907.35, 1,251.63 and 534.21 is: 736.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.35 : 1,251.63 = 534.21 : x
  2. Step 2: Convert to fraction form
    907.35/1,251.63 = 534.21/x
  3. Step 3: Cross multiply
    907.35x = 1,251.63 × 534.21
  4. Step 4: Simplify right side
    907.35x = 668,633.26
  5. Step 5: Solve for x
    x = 668,633.26/907.35
  6. Step 6: Final answer
    x = 736.91

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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.