Home / 1,520.90-2,280.79-740.66

Finding the Fourth Proportional to 1,520.90, 2,280.79 and 740.66

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Solution

The fourth proportional to 1,520.90, 2,280.79 and 740.66 is: 1,110.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.90 : 2,280.79 = 740.66 : x
  2. Step 2: Convert to fraction form
    1,520.90/2,280.79 = 740.66/x
  3. Step 3: Cross multiply
    1,520.90x = 2,280.79 × 740.66
  4. Step 4: Simplify right side
    1,520.90x = 1,689,295.56
  5. Step 5: Solve for x
    x = 1,689,295.56/1,520.90
  6. Step 6: Final answer
    x = 1,110.72

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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.