Home / 2,160.18-3,240.30-621.18

Finding the Fourth Proportional to 2,160.18, 3,240.30 and 621.18

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Solution

The fourth proportional to 2,160.18, 3,240.30 and 621.18 is: 931.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.18 : 3,240.30 = 621.18 : x
  2. Step 2: Convert to fraction form
    2,160.18/3,240.30 = 621.18/x
  3. Step 3: Cross multiply
    2,160.18x = 3,240.30 × 621.18
  4. Step 4: Simplify right side
    2,160.18x = 2,012,809.55
  5. Step 5: Solve for x
    x = 2,012,809.55/2,160.18
  6. Step 6: Final answer
    x = 931.78

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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.