Home / 1,560.38-2,339.63-780.60

Finding the Fourth Proportional to 1,560.38, 2,339.63 and 780.60

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Solution

The fourth proportional to 1,560.38, 2,339.63 and 780.60 is: 1,170.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,560.38 : 2,339.63 = 780.60 : x
  2. Step 2: Convert to fraction form
    1,560.38/2,339.63 = 780.60/x
  3. Step 3: Cross multiply
    1,560.38x = 2,339.63 × 780.60
  4. Step 4: Simplify right side
    1,560.38x = 1,826,315.18
  5. Step 5: Solve for x
    x = 1,826,315.18/1,560.38
  6. Step 6: Final answer
    x = 1,170.43

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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.