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Finding the Fourth Proportional to 709.65, 1,061.94 and 490.32

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Solution

The fourth proportional to 709.65, 1,061.94 and 490.32 is: 733.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.65 : 1,061.94 = 490.32 : x
  2. Step 2: Convert to fraction form
    709.65/1,061.94 = 490.32/x
  3. Step 3: Cross multiply
    709.65x = 1,061.94 × 490.32
  4. Step 4: Simplify right side
    709.65x = 520,690.42
  5. Step 5: Solve for x
    x = 520,690.42/709.65
  6. Step 6: Final answer
    x = 733.73

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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.