Home / 1,081.70-1,621.38-525.23

Finding the Fourth Proportional to 1,081.70, 1,621.38 and 525.23

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Solution

The fourth proportional to 1,081.70, 1,621.38 and 525.23 is: 787.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.70 : 1,621.38 = 525.23 : x
  2. Step 2: Convert to fraction form
    1,081.70/1,621.38 = 525.23/x
  3. Step 3: Cross multiply
    1,081.70x = 1,621.38 × 525.23
  4. Step 4: Simplify right side
    1,081.70x = 851,599.50
  5. Step 5: Solve for x
    x = 851,599.50/1,081.70
  6. Step 6: Final answer
    x = 787.28

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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.