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Finding the Fourth Proportional to 374.52, 517.26 and 315.72

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Solution

The fourth proportional to 374.52, 517.26 and 315.72 is: 436.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.52 : 517.26 = 315.72 : x
  2. Step 2: Convert to fraction form
    374.52/517.26 = 315.72/x
  3. Step 3: Cross multiply
    374.52x = 517.26 × 315.72
  4. Step 4: Simplify right side
    374.52x = 163,309.33
  5. Step 5: Solve for x
    x = 163,309.33/374.52
  6. Step 6: Final answer
    x = 436.05

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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.