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Finding the Fourth Proportional to 314.85, 472.32 and 158.72

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Solution

The fourth proportional to 314.85, 472.32 and 158.72 is: 238.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.85 : 472.32 = 158.72 : x
  2. Step 2: Convert to fraction form
    314.85/472.32 = 158.72/x
  3. Step 3: Cross multiply
    314.85x = 472.32 × 158.72
  4. Step 4: Simplify right side
    314.85x = 74,968.81
  5. Step 5: Solve for x
    x = 74,968.81/314.85
  6. Step 6: Final answer
    x = 238.11

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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.