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Finding the Fourth Proportional to 373.32, 558.36 and 319.86

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Solution

The fourth proportional to 373.32, 558.36 and 319.86 is: 478.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.32 : 558.36 = 319.86 : x
  2. Step 2: Convert to fraction form
    373.32/558.36 = 319.86/x
  3. Step 3: Cross multiply
    373.32x = 558.36 × 319.86
  4. Step 4: Simplify right side
    373.32x = 178,597.03
  5. Step 5: Solve for x
    x = 178,597.03/373.32
  6. Step 6: Final answer
    x = 478.40

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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.