Home / 2,261.79-3,121.76-1,317.74

Finding the Fourth Proportional to 2,261.79, 3,121.76 and 1,317.74

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Solution

The fourth proportional to 2,261.79, 3,121.76 and 1,317.74 is: 1,818.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.79 : 3,121.76 = 1,317.74 : x
  2. Step 2: Convert to fraction form
    2,261.79/3,121.76 = 1,317.74/x
  3. Step 3: Cross multiply
    2,261.79x = 3,121.76 × 1,317.74
  4. Step 4: Simplify right side
    2,261.79x = 4,113,655.71
  5. Step 5: Solve for x
    x = 4,113,655.71/2,261.79
  6. Step 6: Final answer
    x = 1,818.76

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1.5x scale

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.