Home / 1,220.32-1,680.42-1,193.08

Finding the Fourth Proportional to 1,220.32, 1,680.42 and 1,193.08

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Solution

The fourth proportional to 1,220.32, 1,680.42 and 1,193.08 is: 1,642.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.32 : 1,680.42 = 1,193.08 : x
  2. Step 2: Convert to fraction form
    1,220.32/1,680.42 = 1,193.08/x
  3. Step 3: Cross multiply
    1,220.32x = 1,680.42 × 1,193.08
  4. Step 4: Simplify right side
    1,220.32x = 2,004,875.49
  5. Step 5: Solve for x
    x = 2,004,875.49/1,220.32
  6. Step 6: Final answer
    x = 1,642.91

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.