Home / 2,089.60-3,134.50-857.18

Finding the Fourth Proportional to 2,089.60, 3,134.50 and 857.18

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Solution

The fourth proportional to 2,089.60, 3,134.50 and 857.18 is: 1,285.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,089.60 : 3,134.50 = 857.18 : x
  2. Step 2: Convert to fraction form
    2,089.60/3,134.50 = 857.18/x
  3. Step 3: Cross multiply
    2,089.60x = 3,134.50 × 857.18
  4. Step 4: Simplify right side
    2,089.60x = 2,686,836.40
  5. Step 5: Solve for x
    x = 2,686,836.40/2,089.60
  6. Step 6: Final answer
    x = 1,285.82

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1.5x scale

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.