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Finding the Fourth Proportional to 373.86, 561.29 and 316.58

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Solution

The fourth proportional to 373.86, 561.29 and 316.58 is: 475.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.86 : 561.29 = 316.58 : x
  2. Step 2: Convert to fraction form
    373.86/561.29 = 316.58/x
  3. Step 3: Cross multiply
    373.86x = 561.29 × 316.58
  4. Step 4: Simplify right side
    373.86x = 177,688.80
  5. Step 5: Solve for x
    x = 177,688.80/373.86
  6. Step 6: Final answer
    x = 475.28

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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.