Home / 1,520.17-2,097.56-857.02

Finding the Fourth Proportional to 1,520.17, 2,097.56 and 857.02

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Solution

The fourth proportional to 1,520.17, 2,097.56 and 857.02 is: 1,182.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.17 : 2,097.56 = 857.02 : x
  2. Step 2: Convert to fraction form
    1,520.17/2,097.56 = 857.02/x
  3. Step 3: Cross multiply
    1,520.17x = 2,097.56 × 857.02
  4. Step 4: Simplify right side
    1,520.17x = 1,797,645.14
  5. Step 5: Solve for x
    x = 1,797,645.14/1,520.17
  6. Step 6: Final answer
    x = 1,182.53

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1.5x scale

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.