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Finding the Fourth Proportional to 907.49, 1,251.89 and 575.39

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Solution

The fourth proportional to 907.49, 1,251.89 and 575.39 is: 793.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.49 : 1,251.89 = 575.39 : x
  2. Step 2: Convert to fraction form
    907.49/1,251.89 = 575.39/x
  3. Step 3: Cross multiply
    907.49x = 1,251.89 × 575.39
  4. Step 4: Simplify right side
    907.49x = 720,325.24
  5. Step 5: Solve for x
    x = 720,325.24/907.49
  6. Step 6: Final answer
    x = 793.75

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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.