Home / 3,156.90-4,345.29-2,223.78

Finding the Fourth Proportional to 3,156.90, 4,345.29 and 2,223.78

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Solution

The fourth proportional to 3,156.90, 4,345.29 and 2,223.78 is: 3,060.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.90 : 4,345.29 = 2,223.78 : x
  2. Step 2: Convert to fraction form
    3,156.90/4,345.29 = 2,223.78/x
  3. Step 3: Cross multiply
    3,156.90x = 4,345.29 × 2,223.78
  4. Step 4: Simplify right side
    3,156.90x = 9,662,969.00
  5. Step 5: Solve for x
    x = 9,662,969.00/3,156.90
  6. Step 6: Final answer
    x = 3,060.90

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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.