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Finding the Fourth Proportional to 926.68, 1,389.84 and 342.04

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Solution

The fourth proportional to 926.68, 1,389.84 and 342.04 is: 512.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.68 : 1,389.84 = 342.04 : x
  2. Step 2: Convert to fraction form
    926.68/1,389.84 = 342.04/x
  3. Step 3: Cross multiply
    926.68x = 1,389.84 × 342.04
  4. Step 4: Simplify right side
    926.68x = 475,380.87
  5. Step 5: Solve for x
    x = 475,380.87/926.68
  6. Step 6: Final answer
    x = 512.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.