Home / 1,120.20-1,669.72-1,032.72

Finding the Fourth Proportional to 1,120.20, 1,669.72 and 1,032.72

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Solution

The fourth proportional to 1,120.20, 1,669.72 and 1,032.72 is: 1,539.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.20 : 1,669.72 = 1,032.72 : x
  2. Step 2: Convert to fraction form
    1,120.20/1,669.72 = 1,032.72/x
  3. Step 3: Cross multiply
    1,120.20x = 1,669.72 × 1,032.72
  4. Step 4: Simplify right side
    1,120.20x = 1,724,353.24
  5. Step 5: Solve for x
    x = 1,724,353.24/1,120.20
  6. Step 6: Final answer
    x = 1,539.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.