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Finding the Fourth Proportional to 709.62, 1,062.90 and 623.04

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Solution

The fourth proportional to 709.62, 1,062.90 and 623.04 is: 933.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.62 : 1,062.90 = 623.04 : x
  2. Step 2: Convert to fraction form
    709.62/1,062.90 = 623.04/x
  3. Step 3: Cross multiply
    709.62x = 1,062.90 × 623.04
  4. Step 4: Simplify right side
    709.62x = 662,229.22
  5. Step 5: Solve for x
    x = 662,229.22/709.62
  6. Step 6: Final answer
    x = 933.22

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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.