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Finding the Fourth Proportional to 388,310.79, 535,764.20 and 227,205.57

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Solution

The fourth proportional to 388,310.79, 535,764.20 and 227,205.57 is: 313,482.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,310.79 : 535,764.20 = 227,205.57 : x
  2. Step 2: Convert to fraction form
    388,310.79/535,764.20 = 227,205.57/x
  3. Step 3: Cross multiply
    388,310.79x = 535,764.20 × 227,205.57
  4. Step 4: Simplify right side
    388,310.79x = 121,728,609,310.57
  5. Step 5: Solve for x
    x = 121,728,609,310.57/388,310.79
  6. Step 6: Final answer
    x = 313,482.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.