Home / 1,121.75-1,541.52-1,070.30

Finding the Fourth Proportional to 1,121.75, 1,541.52 and 1,070.30

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Solution

The fourth proportional to 1,121.75, 1,541.52 and 1,070.30 is: 1,470.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.75 : 1,541.52 = 1,070.30 : x
  2. Step 2: Convert to fraction form
    1,121.75/1,541.52 = 1,070.30/x
  3. Step 3: Cross multiply
    1,121.75x = 1,541.52 × 1,070.30
  4. Step 4: Simplify right side
    1,121.75x = 1,649,875.80
  5. Step 5: Solve for x
    x = 1,649,875.80/1,121.75
  6. Step 6: Final answer
    x = 1,470.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.