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Finding the Fourth Proportional to 3,258.47, 4,887.17 and 918.63

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Solution

The fourth proportional to 3,258.47, 4,887.17 and 918.63 is: 1,377.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,258.47 : 4,887.17 = 918.63 : x
  2. Step 2: Convert to fraction form
    3,258.47/4,887.17 = 918.63/x
  3. Step 3: Cross multiply
    3,258.47x = 4,887.17 × 918.63
  4. Step 4: Simplify right side
    3,258.47x = 4,489,496.38
  5. Step 5: Solve for x
    x = 4,489,496.38/3,258.47
  6. Step 6: Final answer
    x = 1,377.79

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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.