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Finding the Fourth Proportional to 3,147.63, 4,721.98 and 956.58

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Solution

The fourth proportional to 3,147.63, 4,721.98 and 956.58 is: 1,435.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.63 : 4,721.98 = 956.58 : x
  2. Step 2: Convert to fraction form
    3,147.63/4,721.98 = 956.58/x
  3. Step 3: Cross multiply
    3,147.63x = 4,721.98 × 956.58
  4. Step 4: Simplify right side
    3,147.63x = 4,516,951.63
  5. Step 5: Solve for x
    x = 4,516,951.63/3,147.63
  6. Step 6: Final answer
    x = 1,435.03

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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.