Home / 1,520.10-2,280.02-739.80

Finding the Fourth Proportional to 1,520.10, 2,280.02 and 739.80

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Solution

The fourth proportional to 1,520.10, 2,280.02 and 739.80 is: 1,109.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.10 : 2,280.02 = 739.80 : x
  2. Step 2: Convert to fraction form
    1,520.10/2,280.02 = 739.80/x
  3. Step 3: Cross multiply
    1,520.10x = 2,280.02 × 739.80
  4. Step 4: Simplify right side
    1,520.10x = 1,686,755.10
  5. Step 5: Solve for x
    x = 1,686,755.10/1,520.10
  6. Step 6: Final answer
    x = 1,109.63

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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.