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Finding the Fourth Proportional to 235,421.80, 353,132.70 and 218,141.80

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Solution

The fourth proportional to 235,421.80, 353,132.70 and 218,141.80 is: 327,212.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,421.80 : 353,132.70 = 218,141.80 : x
  2. Step 2: Convert to fraction form
    235,421.80/353,132.70 = 218,141.80/x
  3. Step 3: Cross multiply
    235,421.80x = 353,132.70 × 218,141.80
  4. Step 4: Simplify right side
    235,421.80x = 77,033,002,816.86
  5. Step 5: Solve for x
    x = 77,033,002,816.86/235,421.80
  6. Step 6: Final answer
    x = 327,212.70

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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.