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Finding the Fourth Proportional to 3,147.16, 4,721.48 and 955.95

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Solution

The fourth proportional to 3,147.16, 4,721.48 and 955.95 is: 1,434.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.16 : 4,721.48 = 955.95 : x
  2. Step 2: Convert to fraction form
    3,147.16/4,721.48 = 955.95/x
  3. Step 3: Cross multiply
    3,147.16x = 4,721.48 × 955.95
  4. Step 4: Simplify right side
    3,147.16x = 4,513,475.20
  5. Step 5: Solve for x
    x = 4,513,475.20/3,147.16
  6. Step 6: Final answer
    x = 1,434.14

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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.