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Finding the Fourth Proportional to 885,909.20, 1,328,863.80 and 324,870.80

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Solution

The fourth proportional to 885,909.20, 1,328,863.80 and 324,870.80 is: 487,306.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,909.20 : 1,328,863.80 = 324,870.80 : x
  2. Step 2: Convert to fraction form
    885,909.20/1,328,863.80 = 324,870.80/x
  3. Step 3: Cross multiply
    885,909.20x = 1,328,863.80 × 324,870.80
  4. Step 4: Simplify right side
    885,909.20x = 431,709,045,797.04
  5. Step 5: Solve for x
    x = 431,709,045,797.04/885,909.20
  6. Step 6: Final answer
    x = 487,306.20

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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.