Home / 1,537.29-2,121.39-947.88

Finding the Fourth Proportional to 1,537.29, 2,121.39 and 947.88

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Solution

The fourth proportional to 1,537.29, 2,121.39 and 947.88 is: 1,308.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,537.29 : 2,121.39 = 947.88 : x
  2. Step 2: Convert to fraction form
    1,537.29/2,121.39 = 947.88/x
  3. Step 3: Cross multiply
    1,537.29x = 2,121.39 × 947.88
  4. Step 4: Simplify right side
    1,537.29x = 2,010,823.15
  5. Step 5: Solve for x
    x = 2,010,823.15/1,537.29
  6. Step 6: Final answer
    x = 1,308.03

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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.