Home / 1,309.10-1,975.31-1,258.47

Finding the Fourth Proportional to 1,309.10, 1,975.31 and 1,258.47

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Solution

The fourth proportional to 1,309.10, 1,975.31 and 1,258.47 is: 1,898.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.10 : 1,975.31 = 1,258.47 : x
  2. Step 2: Convert to fraction form
    1,309.10/1,975.31 = 1,258.47/x
  3. Step 3: Cross multiply
    1,309.10x = 1,975.31 × 1,258.47
  4. Step 4: Simplify right side
    1,309.10x = 2,485,868.38
  5. Step 5: Solve for x
    x = 2,485,868.38/1,309.10
  6. Step 6: Final answer
    x = 1,898.91

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.