Home / 1,520.40-2,280.42-698.52

Finding the Fourth Proportional to 1,520.40, 2,280.42 and 698.52

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Solution

The fourth proportional to 1,520.40, 2,280.42 and 698.52 is: 1,047.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.40 : 2,280.42 = 698.52 : x
  2. Step 2: Convert to fraction form
    1,520.40/2,280.42 = 698.52/x
  3. Step 3: Cross multiply
    1,520.40x = 2,280.42 × 698.52
  4. Step 4: Simplify right side
    1,520.40x = 1,592,918.98
  5. Step 5: Solve for x
    x = 1,592,918.98/1,520.40
  6. Step 6: Final answer
    x = 1,047.70

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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.