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Finding the Fourth Proportional to 374.64, 562.26 and 212.40

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Solution

The fourth proportional to 374.64, 562.26 and 212.40 is: 318.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.64 : 562.26 = 212.40 : x
  2. Step 2: Convert to fraction form
    374.64/562.26 = 212.40/x
  3. Step 3: Cross multiply
    374.64x = 562.26 × 212.40
  4. Step 4: Simplify right side
    374.64x = 119,424.02
  5. Step 5: Solve for x
    x = 119,424.02/374.64
  6. Step 6: Final answer
    x = 318.77

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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.