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Finding the Fourth Proportional to 218,992.80, 328,412.40 and 113,776.80

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Solution

The fourth proportional to 218,992.80, 328,412.40 and 113,776.80 is: 170,625.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,992.80 : 328,412.40 = 113,776.80 : x
  2. Step 2: Convert to fraction form
    218,992.80/328,412.40 = 113,776.80/x
  3. Step 3: Cross multiply
    218,992.80x = 328,412.40 × 113,776.80
  4. Step 4: Simplify right side
    218,992.80x = 37,365,711,952.32
  5. Step 5: Solve for x
    x = 37,365,711,952.32/218,992.80
  6. Step 6: Final answer
    x = 170,625.30

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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.