Home / 1,085.28-1,628.14-354.90

Finding the Fourth Proportional to 1,085.28, 1,628.14 and 354.90

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Solution

The fourth proportional to 1,085.28, 1,628.14 and 354.90 is: 532.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.28 : 1,628.14 = 354.90 : x
  2. Step 2: Convert to fraction form
    1,085.28/1,628.14 = 354.90/x
  3. Step 3: Cross multiply
    1,085.28x = 1,628.14 × 354.90
  4. Step 4: Simplify right side
    1,085.28x = 577,826.89
  5. Step 5: Solve for x
    x = 577,826.89/1,085.28
  6. Step 6: Final answer
    x = 532.42

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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.