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Finding the Fourth Proportional to 326,208.20, 488,729.10 and 266,721.80

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Solution

The fourth proportional to 326,208.20, 488,729.10 and 266,721.80 is: 399,605.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,208.20 : 488,729.10 = 266,721.80 : x
  2. Step 2: Convert to fraction form
    326,208.20/488,729.10 = 266,721.80/x
  3. Step 3: Cross multiply
    326,208.20x = 488,729.10 × 266,721.80
  4. Step 4: Simplify right side
    326,208.20x = 130,354,705,264.38
  5. Step 5: Solve for x
    x = 130,354,705,264.38/326,208.20
  6. Step 6: Final answer
    x = 399,605.85

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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.