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Finding the Fourth Proportional to 228.71, 315.56 and 130.47

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Solution

The fourth proportional to 228.71, 315.56 and 130.47 is: 180.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.71 : 315.56 = 130.47 : x
  2. Step 2: Convert to fraction form
    228.71/315.56 = 130.47/x
  3. Step 3: Cross multiply
    228.71x = 315.56 × 130.47
  4. Step 4: Simplify right side
    228.71x = 41,170.26
  5. Step 5: Solve for x
    x = 41,170.26/228.71
  6. Step 6: Final answer
    x = 180.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.