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Finding the Fourth Proportional to 221,449.40, 332,174.10 and 209,785.40

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Solution

The fourth proportional to 221,449.40, 332,174.10 and 209,785.40 is: 314,678.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,449.40 : 332,174.10 = 209,785.40 : x
  2. Step 2: Convert to fraction form
    221,449.40/332,174.10 = 209,785.40/x
  3. Step 3: Cross multiply
    221,449.40x = 332,174.10 × 209,785.40
  4. Step 4: Simplify right side
    221,449.40x = 69,685,276,438.14
  5. Step 5: Solve for x
    x = 69,685,276,438.14/221,449.40
  6. Step 6: Final answer
    x = 314,678.10

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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.