Home / 1,521.17-2,281.80-1,277.90

Finding the Fourth Proportional to 1,521.17, 2,281.80 and 1,277.90

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Solution

The fourth proportional to 1,521.17, 2,281.80 and 1,277.90 is: 1,916.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.17 : 2,281.80 = 1,277.90 : x
  2. Step 2: Convert to fraction form
    1,521.17/2,281.80 = 1,277.90/x
  3. Step 3: Cross multiply
    1,521.17x = 2,281.80 × 1,277.90
  4. Step 4: Simplify right side
    1,521.17x = 2,915,912.22
  5. Step 5: Solve for x
    x = 2,915,912.22/1,521.17
  6. Step 6: Final answer
    x = 1,916.89

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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.