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Finding the Fourth Proportional to 865.10, 1,297.21 and 377.93

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Solution

The fourth proportional to 865.10, 1,297.21 and 377.93 is: 566.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.10 : 1,297.21 = 377.93 : x
  2. Step 2: Convert to fraction form
    865.10/1,297.21 = 377.93/x
  3. Step 3: Cross multiply
    865.10x = 1,297.21 × 377.93
  4. Step 4: Simplify right side
    865.10x = 490,254.58
  5. Step 5: Solve for x
    x = 490,254.58/865.10
  6. Step 6: Final answer
    x = 566.70

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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.