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Finding the Fourth Proportional to 2,921.57, 4,381.92 and 946.95

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Solution

The fourth proportional to 2,921.57, 4,381.92 and 946.95 is: 1,420.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.57 : 4,381.92 = 946.95 : x
  2. Step 2: Convert to fraction form
    2,921.57/4,381.92 = 946.95/x
  3. Step 3: Cross multiply
    2,921.57x = 4,381.92 × 946.95
  4. Step 4: Simplify right side
    2,921.57x = 4,149,459.14
  5. Step 5: Solve for x
    x = 4,149,459.14/2,921.57
  6. Step 6: Final answer
    x = 1,420.28

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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.