Home / 1,931.50-2,872.40-1,869.99

Finding the Fourth Proportional to 1,931.50, 2,872.40 and 1,869.99

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Solution

The fourth proportional to 1,931.50, 2,872.40 and 1,869.99 is: 2,780.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.50 : 2,872.40 = 1,869.99 : x
  2. Step 2: Convert to fraction form
    1,931.50/2,872.40 = 1,869.99/x
  3. Step 3: Cross multiply
    1,931.50x = 2,872.40 × 1,869.99
  4. Step 4: Simplify right side
    1,931.50x = 5,371,359.28
  5. Step 5: Solve for x
    x = 5,371,359.28/1,931.50
  6. Step 6: Final answer
    x = 2,780.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.