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Finding the Fourth Proportional to 373.20, 560.16 and 312.72

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Solution

The fourth proportional to 373.20, 560.16 and 312.72 is: 469.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.20 : 560.16 = 312.72 : x
  2. Step 2: Convert to fraction form
    373.20/560.16 = 312.72/x
  3. Step 3: Cross multiply
    373.20x = 560.16 × 312.72
  4. Step 4: Simplify right side
    373.20x = 175,173.24
  5. Step 5: Solve for x
    x = 175,173.24/373.20
  6. Step 6: Final answer
    x = 469.38

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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.