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Finding the Fourth Proportional to 315.10, 472.76 and 120.11

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Solution

The fourth proportional to 315.10, 472.76 and 120.11 is: 180.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.10 : 472.76 = 120.11 : x
  2. Step 2: Convert to fraction form
    315.10/472.76 = 120.11/x
  3. Step 3: Cross multiply
    315.10x = 472.76 × 120.11
  4. Step 4: Simplify right side
    315.10x = 56,782.60
  5. Step 5: Solve for x
    x = 56,782.60/315.10
  6. Step 6: Final answer
    x = 180.21

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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.