Home / 1,381.14-2,071.71-456.35

Finding the Fourth Proportional to 1,381.14, 2,071.71 and 456.35

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Solution

The fourth proportional to 1,381.14, 2,071.71 and 456.35 is: 684.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.14 : 2,071.71 = 456.35 : x
  2. Step 2: Convert to fraction form
    1,381.14/2,071.71 = 456.35/x
  3. Step 3: Cross multiply
    1,381.14x = 2,071.71 × 456.35
  4. Step 4: Simplify right side
    1,381.14x = 945,414.50
  5. Step 5: Solve for x
    x = 945,414.50/1,381.14
  6. Step 6: Final answer
    x = 684.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.