Home / 5,230.10-7,215.49-2,990.78

Finding the Fourth Proportional to 5,230.10, 7,215.49 and 2,990.78

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Solution

The fourth proportional to 5,230.10, 7,215.49 and 2,990.78 is: 4,126.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,230.10 : 7,215.49 = 2,990.78 : x
  2. Step 2: Convert to fraction form
    5,230.10/7,215.49 = 2,990.78/x
  3. Step 3: Cross multiply
    5,230.10x = 7,215.49 × 2,990.78
  4. Step 4: Simplify right side
    5,230.10x = 21,579,943.18
  5. Step 5: Solve for x
    x = 21,579,943.18/5,230.10
  6. Step 6: Final answer
    x = 4,126.11

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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.