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Finding the Fourth Proportional to 2,141.68, 2,954.80 and 1,355.92

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Solution

The fourth proportional to 2,141.68, 2,954.80 and 1,355.92 is: 1,870.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,141.68 : 2,954.80 = 1,355.92 : x
  2. Step 2: Convert to fraction form
    2,141.68/2,954.80 = 1,355.92/x
  3. Step 3: Cross multiply
    2,141.68x = 2,954.80 × 1,355.92
  4. Step 4: Simplify right side
    2,141.68x = 4,006,472.42
  5. Step 5: Solve for x
    x = 4,006,472.42/2,141.68
  6. Step 6: Final answer
    x = 1,870.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.