Home / 3,117.50-4,678.11-1,243.05

Finding the Fourth Proportional to 3,117.50, 4,678.11 and 1,243.05

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Solution

The fourth proportional to 3,117.50, 4,678.11 and 1,243.05 is: 1,865.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.50 : 4,678.11 = 1,243.05 : x
  2. Step 2: Convert to fraction form
    3,117.50/4,678.11 = 1,243.05/x
  3. Step 3: Cross multiply
    3,117.50x = 4,678.11 × 1,243.05
  4. Step 4: Simplify right side
    3,117.50x = 5,815,130.12
  5. Step 5: Solve for x
    x = 5,815,130.12/3,117.50
  6. Step 6: Final answer
    x = 1,865.32

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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.