Home / 1,947-2,686.46-1,317.63

Finding the Fourth Proportional to 1,947, 2,686.46 and 1,317.63

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Solution

The fourth proportional to 1,947, 2,686.46 and 1,317.63 is: 1,818.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947 : 2,686.46 = 1,317.63 : x
  2. Step 2: Convert to fraction form
    1,947/2,686.46 = 1,317.63/x
  3. Step 3: Cross multiply
    1,947x = 2,686.46 × 1,317.63
  4. Step 4: Simplify right side
    1,947x = 3,539,753.70
  5. Step 5: Solve for x
    x = 3,539,753.70/1,947
  6. Step 6: Final answer
    x = 1,818.06

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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.