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Finding the Fourth Proportional to 372.71, 561.05 and 339.23

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Solution

The fourth proportional to 372.71, 561.05 and 339.23 is: 510.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.71 : 561.05 = 339.23 : x
  2. Step 2: Convert to fraction form
    372.71/561.05 = 339.23/x
  3. Step 3: Cross multiply
    372.71x = 561.05 × 339.23
  4. Step 4: Simplify right side
    372.71x = 190,320.49
  5. Step 5: Solve for x
    x = 190,320.49/372.71
  6. Step 6: Final answer
    x = 510.65

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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.