Home / 1,588.20-2,189.52-998.40

Finding the Fourth Proportional to 1,588.20, 2,189.52 and 998.40

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Solution

The fourth proportional to 1,588.20, 2,189.52 and 998.40 is: 1,376.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,588.20 : 2,189.52 = 998.40 : x
  2. Step 2: Convert to fraction form
    1,588.20/2,189.52 = 998.40/x
  3. Step 3: Cross multiply
    1,588.20x = 2,189.52 × 998.40
  4. Step 4: Simplify right side
    1,588.20x = 2,186,016.77
  5. Step 5: Solve for x
    x = 2,186,016.77/1,588.20
  6. Step 6: Final answer
    x = 1,376.41

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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.