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Finding the Fourth Proportional to 326,807.80, 490,211.70 and 105,191.80

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Solution

The fourth proportional to 326,807.80, 490,211.70 and 105,191.80 is: 157,787.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,807.80 : 490,211.70 = 105,191.80 : x
  2. Step 2: Convert to fraction form
    326,807.80/490,211.70 = 105,191.80/x
  3. Step 3: Cross multiply
    326,807.80x = 490,211.70 × 105,191.80
  4. Step 4: Simplify right side
    326,807.80x = 51,566,251,104.06
  5. Step 5: Solve for x
    x = 51,566,251,104.06/326,807.80
  6. Step 6: Final answer
    x = 157,787.70

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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.