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Finding the Fourth Proportional to 864.87, 1,297.31 and 377.87

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Solution

The fourth proportional to 864.87, 1,297.31 and 377.87 is: 566.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.87 : 1,297.31 = 377.87 : x
  2. Step 2: Convert to fraction form
    864.87/1,297.31 = 377.87/x
  3. Step 3: Cross multiply
    864.87x = 1,297.31 × 377.87
  4. Step 4: Simplify right side
    864.87x = 490,206.15
  5. Step 5: Solve for x
    x = 490,206.15/864.87
  6. Step 6: Final answer
    x = 566.80

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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.