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Finding the Fourth Proportional to 926.81, 1,279.02 and 507.17

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Solution

The fourth proportional to 926.81, 1,279.02 and 507.17 is: 699.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.81 : 1,279.02 = 507.17 : x
  2. Step 2: Convert to fraction form
    926.81/1,279.02 = 507.17/x
  3. Step 3: Cross multiply
    926.81x = 1,279.02 × 507.17
  4. Step 4: Simplify right side
    926.81x = 648,674.18
  5. Step 5: Solve for x
    x = 648,674.18/926.81
  6. Step 6: Final answer
    x = 699.90

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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.