Home / 1,205.60-1,664.50-985.08

Finding the Fourth Proportional to 1,205.60, 1,664.50 and 985.08

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Solution

The fourth proportional to 1,205.60, 1,664.50 and 985.08 is: 1,360.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205.60 : 1,664.50 = 985.08 : x
  2. Step 2: Convert to fraction form
    1,205.60/1,664.50 = 985.08/x
  3. Step 3: Cross multiply
    1,205.60x = 1,664.50 × 985.08
  4. Step 4: Simplify right side
    1,205.60x = 1,639,665.66
  5. Step 5: Solve for x
    x = 1,639,665.66/1,205.60
  6. Step 6: Final answer
    x = 1,360.04

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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.