Home / 1,572.29-2,170.85-983.09

Finding the Fourth Proportional to 1,572.29, 2,170.85 and 983.09

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Solution

The fourth proportional to 1,572.29, 2,170.85 and 983.09 is: 1,357.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.29 : 2,170.85 = 983.09 : x
  2. Step 2: Convert to fraction form
    1,572.29/2,170.85 = 983.09/x
  3. Step 3: Cross multiply
    1,572.29x = 2,170.85 × 983.09
  4. Step 4: Simplify right side
    1,572.29x = 2,134,136.01
  5. Step 5: Solve for x
    x = 2,134,136.01/1,572.29
  6. Step 6: Final answer
    x = 1,357.34

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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.