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Finding the Fourth Proportional to 907.02, 1,251.76 and 508.66

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Solution

The fourth proportional to 907.02, 1,251.76 and 508.66 is: 701.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.02 : 1,251.76 = 508.66 : x
  2. Step 2: Convert to fraction form
    907.02/1,251.76 = 508.66/x
  3. Step 3: Cross multiply
    907.02x = 1,251.76 × 508.66
  4. Step 4: Simplify right side
    907.02x = 636,720.24
  5. Step 5: Solve for x
    x = 636,720.24/907.02
  6. Step 6: Final answer
    x = 701.99

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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.