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Finding the Fourth Proportional to 1,315.66, 1,974.10 and 1,300.48

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Solution

The fourth proportional to 1,315.66, 1,974.10 and 1,300.48 is: 1,951.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.66 : 1,974.10 = 1,300.48 : x
  2. Step 2: Convert to fraction form
    1,315.66/1,974.10 = 1,300.48/x
  3. Step 3: Cross multiply
    1,315.66x = 1,974.10 × 1,300.48
  4. Step 4: Simplify right side
    1,315.66x = 2,567,277.57
  5. Step 5: Solve for x
    x = 2,567,277.57/1,315.66
  6. Step 6: Final answer
    x = 1,951.32

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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.