Home / 1,572.85-2,171.91-984.39

Finding the Fourth Proportional to 1,572.85, 2,171.91 and 984.39

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Solution

The fourth proportional to 1,572.85, 2,171.91 and 984.39 is: 1,359.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.85 : 2,171.91 = 984.39 : x
  2. Step 2: Convert to fraction form
    1,572.85/2,171.91 = 984.39/x
  3. Step 3: Cross multiply
    1,572.85x = 2,171.91 × 984.39
  4. Step 4: Simplify right side
    1,572.85x = 2,138,006.48
  5. Step 5: Solve for x
    x = 2,138,006.48/1,572.85
  6. Step 6: Final answer
    x = 1,359.32

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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.