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Finding the Fourth Proportional to 926.97, 1,279.20 and 507.36

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Solution

The fourth proportional to 926.97, 1,279.20 and 507.36 is: 700.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.97 : 1,279.20 = 507.36 : x
  2. Step 2: Convert to fraction form
    926.97/1,279.20 = 507.36/x
  3. Step 3: Cross multiply
    926.97x = 1,279.20 × 507.36
  4. Step 4: Simplify right side
    926.97x = 649,014.91
  5. Step 5: Solve for x
    x = 649,014.91/926.97
  6. Step 6: Final answer
    x = 700.15

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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.