Home / 869,439.20-1,304,223.60-308,400.80

Finding the Fourth Proportional to 869,439.20, 1,304,223.60 and 308,400.80

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Solution

The fourth proportional to 869,439.20, 1,304,223.60 and 308,400.80 is: 462,624.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,439.20 : 1,304,223.60 = 308,400.80 : x
  2. Step 2: Convert to fraction form
    869,439.20/1,304,223.60 = 308,400.80/x
  3. Step 3: Cross multiply
    869,439.20x = 1,304,223.60 × 308,400.80
  4. Step 4: Simplify right side
    869,439.20x = 402,223,601,618.88
  5. Step 5: Solve for x
    x = 402,223,601,618.88/869,439.20
  6. Step 6: Final answer
    x = 462,624.19

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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.