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Finding the Fourth Proportional to 218,758.90, 327,628.48 and 211,182.31

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Solution

The fourth proportional to 218,758.90, 327,628.48 and 211,182.31 is: 316,281.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,758.90 : 327,628.48 = 211,182.31 : x
  2. Step 2: Convert to fraction form
    218,758.90/327,628.48 = 211,182.31/x
  3. Step 3: Cross multiply
    218,758.90x = 327,628.48 × 211,182.31
  4. Step 4: Simplify right side
    218,758.90x = 69,189,337,881.16
  5. Step 5: Solve for x
    x = 69,189,337,881.16/218,758.90
  6. Step 6: Final answer
    x = 316,281.25

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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.