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Finding the Fourth Proportional to 816,073.20, 1,223,672.40 and 342,223.20

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Solution

The fourth proportional to 816,073.20, 1,223,672.40 and 342,223.20 is: 513,151.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,073.20 : 1,223,672.40 = 342,223.20 : x
  2. Step 2: Convert to fraction form
    816,073.20/1,223,672.40 = 342,223.20/x
  3. Step 3: Cross multiply
    816,073.20x = 1,223,672.40 × 342,223.20
  4. Step 4: Simplify right side
    816,073.20x = 418,769,084,479.68
  5. Step 5: Solve for x
    x = 418,769,084,479.68/816,073.20
  6. Step 6: Final answer
    x = 513,151.37

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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.