Home / 1,285.16-1,772.58-1,108.46

Finding the Fourth Proportional to 1,285.16, 1,772.58 and 1,108.46

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Solution

The fourth proportional to 1,285.16, 1,772.58 and 1,108.46 is: 1,528.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.16 : 1,772.58 = 1,108.46 : x
  2. Step 2: Convert to fraction form
    1,285.16/1,772.58 = 1,108.46/x
  3. Step 3: Cross multiply
    1,285.16x = 1,772.58 × 1,108.46
  4. Step 4: Simplify right side
    1,285.16x = 1,964,834.03
  5. Step 5: Solve for x
    x = 1,964,834.03/1,285.16
  6. Step 6: Final answer
    x = 1,528.86

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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.