Home / 1,317.28-1,812.60-1,277.20

Finding the Fourth Proportional to 1,317.28, 1,812.60 and 1,277.20

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Solution

The fourth proportional to 1,317.28, 1,812.60 and 1,277.20 is: 1,757.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.28 : 1,812.60 = 1,277.20 : x
  2. Step 2: Convert to fraction form
    1,317.28/1,812.60 = 1,277.20/x
  3. Step 3: Cross multiply
    1,317.28x = 1,812.60 × 1,277.20
  4. Step 4: Simplify right side
    1,317.28x = 2,315,052.72
  5. Step 5: Solve for x
    x = 2,315,052.72/1,317.28
  6. Step 6: Final answer
    x = 1,757.45

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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.