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Finding the Fourth Proportional to 372.48, 561.60 and 340.48

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Solution

The fourth proportional to 372.48, 561.60 and 340.48 is: 513.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.48 : 561.60 = 340.48 : x
  2. Step 2: Convert to fraction form
    372.48/561.60 = 340.48/x
  3. Step 3: Cross multiply
    372.48x = 561.60 × 340.48
  4. Step 4: Simplify right side
    372.48x = 191,213.57
  5. Step 5: Solve for x
    x = 191,213.57/372.48
  6. Step 6: Final answer
    x = 513.35

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.