Home / 1,521.24-2,280.78-686.94

Finding the Fourth Proportional to 1,521.24, 2,280.78 and 686.94

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Solution

The fourth proportional to 1,521.24, 2,280.78 and 686.94 is: 1,029.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.24 : 2,280.78 = 686.94 : x
  2. Step 2: Convert to fraction form
    1,521.24/2,280.78 = 686.94/x
  3. Step 3: Cross multiply
    1,521.24x = 2,280.78 × 686.94
  4. Step 4: Simplify right side
    1,521.24x = 1,566,759.01
  5. Step 5: Solve for x
    x = 1,566,759.01/1,521.24
  6. Step 6: Final answer
    x = 1,029.92

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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.