Home / 1,520.10-2,280.15-698.49

Finding the Fourth Proportional to 1,520.10, 2,280.15 and 698.49

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Solution

The fourth proportional to 1,520.10, 2,280.15 and 698.49 is: 1,047.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.10 : 2,280.15 = 698.49 : x
  2. Step 2: Convert to fraction form
    1,520.10/2,280.15 = 698.49/x
  3. Step 3: Cross multiply
    1,520.10x = 2,280.15 × 698.49
  4. Step 4: Simplify right side
    1,520.10x = 1,592,661.97
  5. Step 5: Solve for x
    x = 1,592,661.97/1,520.10
  6. Step 6: Final answer
    x = 1,047.74

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Double scale
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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.