Home / 3,117.60-4,302.28-1,720.35

Finding the Fourth Proportional to 3,117.60, 4,302.28 and 1,720.35

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Solution

The fourth proportional to 3,117.60, 4,302.28 and 1,720.35 is: 2,374.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.60 : 4,302.28 = 1,720.35 : x
  2. Step 2: Convert to fraction form
    3,117.60/4,302.28 = 1,720.35/x
  3. Step 3: Cross multiply
    3,117.60x = 4,302.28 × 1,720.35
  4. Step 4: Simplify right side
    3,117.60x = 7,401,405.89
  5. Step 5: Solve for x
    x = 7,401,405.89/3,117.60
  6. Step 6: Final answer
    x = 2,374.08

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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.