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Finding the Fourth Proportional to 315.12, 472.62 and 130.08

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Solution

The fourth proportional to 315.12, 472.62 and 130.08 is: 195.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.12 : 472.62 = 130.08 : x
  2. Step 2: Convert to fraction form
    315.12/472.62 = 130.08/x
  3. Step 3: Cross multiply
    315.12x = 472.62 × 130.08
  4. Step 4: Simplify right side
    315.12x = 61,478.41
  5. Step 5: Solve for x
    x = 61,478.41/315.12
  6. Step 6: Final answer
    x = 195.10

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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.