Home / 2,219.60-3,332.10-1,123.40

Finding the Fourth Proportional to 2,219.60, 3,332.10 and 1,123.40

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Solution

The fourth proportional to 2,219.60, 3,332.10 and 1,123.40 is: 1,686.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.60 : 3,332.10 = 1,123.40 : x
  2. Step 2: Convert to fraction form
    2,219.60/3,332.10 = 1,123.40/x
  3. Step 3: Cross multiply
    2,219.60x = 3,332.10 × 1,123.40
  4. Step 4: Simplify right side
    2,219.60x = 3,743,281.14
  5. Step 5: Solve for x
    x = 3,743,281.14/2,219.60
  6. Step 6: Final answer
    x = 1,686.47

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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.