Home / 3,140.50-4,712.28-1,292.17

Finding the Fourth Proportional to 3,140.50, 4,712.28 and 1,292.17

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Solution

The fourth proportional to 3,140.50, 4,712.28 and 1,292.17 is: 1,938.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.50 : 4,712.28 = 1,292.17 : x
  2. Step 2: Convert to fraction form
    3,140.50/4,712.28 = 1,292.17/x
  3. Step 3: Cross multiply
    3,140.50x = 4,712.28 × 1,292.17
  4. Step 4: Simplify right side
    3,140.50x = 6,089,066.85
  5. Step 5: Solve for x
    x = 6,089,066.85/3,140.50
  6. Step 6: Final answer
    x = 1,938.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.