Home / 3,117.56-4,302.18-1,720.28

Finding the Fourth Proportional to 3,117.56, 4,302.18 and 1,720.28

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Solution

The fourth proportional to 3,117.56, 4,302.18 and 1,720.28 is: 2,373.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.56 : 4,302.18 = 1,720.28 : x
  2. Step 2: Convert to fraction form
    3,117.56/4,302.18 = 1,720.28/x
  3. Step 3: Cross multiply
    3,117.56x = 4,302.18 × 1,720.28
  4. Step 4: Simplify right side
    3,117.56x = 7,400,954.21
  5. Step 5: Solve for x
    x = 7,400,954.21/3,117.56
  6. Step 6: Final answer
    x = 2,373.96

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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.