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Finding the Fourth Proportional to 374.13, 515.98 and 281.10

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Solution

The fourth proportional to 374.13, 515.98 and 281.10 is: 387.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.13 : 515.98 = 281.10 : x
  2. Step 2: Convert to fraction form
    374.13/515.98 = 281.10/x
  3. Step 3: Cross multiply
    374.13x = 515.98 × 281.10
  4. Step 4: Simplify right side
    374.13x = 145,041.98
  5. Step 5: Solve for x
    x = 145,041.98/374.13
  6. Step 6: Final answer
    x = 387.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.