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Finding the Fourth Proportional to 3,146.78, 4,720.75 and 954.99

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Solution

The fourth proportional to 3,146.78, 4,720.75 and 954.99 is: 1,432.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,146.78 : 4,720.75 = 954.99 : x
  2. Step 2: Convert to fraction form
    3,146.78/4,720.75 = 954.99/x
  3. Step 3: Cross multiply
    3,146.78x = 4,720.75 × 954.99
  4. Step 4: Simplify right side
    3,146.78x = 4,508,266.66
  5. Step 5: Solve for x
    x = 4,508,266.66/3,146.78
  6. Step 6: Final answer
    x = 1,432.66

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1.5x scale

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.