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Finding the Fourth Proportional to 926.18, 1,389.59 and 662.90

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Solution

The fourth proportional to 926.18, 1,389.59 and 662.90 is: 994.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.18 : 1,389.59 = 662.90 : x
  2. Step 2: Convert to fraction form
    926.18/1,389.59 = 662.90/x
  3. Step 3: Cross multiply
    926.18x = 1,389.59 × 662.90
  4. Step 4: Simplify right side
    926.18x = 921,151.43
  5. Step 5: Solve for x
    x = 921,151.43/926.18
  6. Step 6: Final answer
    x = 994.57

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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.