Home / 1,742.87-2,402.43-1,321.53

Finding the Fourth Proportional to 1,742.87, 2,402.43 and 1,321.53

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Solution

The fourth proportional to 1,742.87, 2,402.43 and 1,321.53 is: 1,821.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,742.87 : 2,402.43 = 1,321.53 : x
  2. Step 2: Convert to fraction form
    1,742.87/2,402.43 = 1,321.53/x
  3. Step 3: Cross multiply
    1,742.87x = 2,402.43 × 1,321.53
  4. Step 4: Simplify right side
    1,742.87x = 3,174,883.32
  5. Step 5: Solve for x
    x = 3,174,883.32/1,742.87
  6. Step 6: Final answer
    x = 1,821.65

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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.