Home / 3,117.52-4,302.28-1,720.40

Finding the Fourth Proportional to 3,117.52, 4,302.28 and 1,720.40

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Solution

The fourth proportional to 3,117.52, 4,302.28 and 1,720.40 is: 2,374.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.52 : 4,302.28 = 1,720.40 : x
  2. Step 2: Convert to fraction form
    3,117.52/4,302.28 = 1,720.40/x
  3. Step 3: Cross multiply
    3,117.52x = 4,302.28 × 1,720.40
  4. Step 4: Simplify right side
    3,117.52x = 7,401,642.51
  5. Step 5: Solve for x
    x = 7,401,642.51/3,117.52
  6. Step 6: Final answer
    x = 2,374.21

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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.