Home / 408,108.27-612,225.78-208,320.55

Finding the Fourth Proportional to 408,108.27, 612,225.78 and 208,320.55

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Solution

The fourth proportional to 408,108.27, 612,225.78 and 208,320.55 is: 312,513.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,108.27 : 612,225.78 = 208,320.55 : x
  2. Step 2: Convert to fraction form
    408,108.27/612,225.78 = 208,320.55/x
  3. Step 3: Cross multiply
    408,108.27x = 612,225.78 × 208,320.55
  4. Step 4: Simplify right side
    408,108.27x = 127,539,211,213.78
  5. Step 5: Solve for x
    x = 127,539,211,213.78/408,108.27
  6. Step 6: Final answer
    x = 312,513.18

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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.