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Finding the Fourth Proportional to 488.77, 731.74 and 380.65

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Solution

The fourth proportional to 488.77, 731.74 and 380.65 is: 569.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.77 : 731.74 = 380.65 : x
  2. Step 2: Convert to fraction form
    488.77/731.74 = 380.65/x
  3. Step 3: Cross multiply
    488.77x = 731.74 × 380.65
  4. Step 4: Simplify right side
    488.77x = 278,536.83
  5. Step 5: Solve for x
    x = 278,536.83/488.77
  6. Step 6: Final answer
    x = 569.87

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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.