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Finding the Fourth Proportional to 374.46, 561.81 and 253.18

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Solution

The fourth proportional to 374.46, 561.81 and 253.18 is: 379.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.46 : 561.81 = 253.18 : x
  2. Step 2: Convert to fraction form
    374.46/561.81 = 253.18/x
  3. Step 3: Cross multiply
    374.46x = 561.81 × 253.18
  4. Step 4: Simplify right side
    374.46x = 142,239.06
  5. Step 5: Solve for x
    x = 142,239.06/374.46
  6. Step 6: Final answer
    x = 379.85

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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.