Home / 1,732.19-2,390.42-986.39

Finding the Fourth Proportional to 1,732.19, 2,390.42 and 986.39

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Solution

The fourth proportional to 1,732.19, 2,390.42 and 986.39 is: 1,361.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,732.19 : 2,390.42 = 986.39 : x
  2. Step 2: Convert to fraction form
    1,732.19/2,390.42 = 986.39/x
  3. Step 3: Cross multiply
    1,732.19x = 2,390.42 × 986.39
  4. Step 4: Simplify right side
    1,732.19x = 2,357,869.50
  5. Step 5: Solve for x
    x = 2,357,869.50/1,732.19
  6. Step 6: Final answer
    x = 1,361.21

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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.