Home / 1,555.23-2,332.85-1,280.75

Finding the Fourth Proportional to 1,555.23, 2,332.85 and 1,280.75

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Solution

The fourth proportional to 1,555.23, 2,332.85 and 1,280.75 is: 1,921.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.23 : 2,332.85 = 1,280.75 : x
  2. Step 2: Convert to fraction form
    1,555.23/2,332.85 = 1,280.75/x
  3. Step 3: Cross multiply
    1,555.23x = 2,332.85 × 1,280.75
  4. Step 4: Simplify right side
    1,555.23x = 2,987,779.57
  5. Step 5: Solve for x
    x = 2,987,779.57/1,555.23
  6. Step 6: Final answer
    x = 1,921.12

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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.