Home / 1,280.18-1,920.27-847.23

Finding the Fourth Proportional to 1,280.18, 1,920.27 and 847.23

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Solution

The fourth proportional to 1,280.18, 1,920.27 and 847.23 is: 1,270.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.18 : 1,920.27 = 847.23 : x
  2. Step 2: Convert to fraction form
    1,280.18/1,920.27 = 847.23/x
  3. Step 3: Cross multiply
    1,280.18x = 1,920.27 × 847.23
  4. Step 4: Simplify right side
    1,280.18x = 1,626,917.55
  5. Step 5: Solve for x
    x = 1,626,917.55/1,280.18
  6. Step 6: Final answer
    x = 1,270.85

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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.