Home / 1,438.34-2,159.34-1,379.84

Finding the Fourth Proportional to 1,438.34, 2,159.34 and 1,379.84

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Solution

The fourth proportional to 1,438.34, 2,159.34 and 1,379.84 is: 2,071.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.34 : 2,159.34 = 1,379.84 : x
  2. Step 2: Convert to fraction form
    1,438.34/2,159.34 = 1,379.84/x
  3. Step 3: Cross multiply
    1,438.34x = 2,159.34 × 1,379.84
  4. Step 4: Simplify right side
    1,438.34x = 2,979,543.71
  5. Step 5: Solve for x
    x = 2,979,543.71/1,438.34
  6. Step 6: Final answer
    x = 2,071.52

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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.