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Finding the Fourth Proportional to 389,404.20, 537,384.80 and 228,375.39

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Solution

The fourth proportional to 389,404.20, 537,384.80 and 228,375.39 is: 315,162.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,404.20 : 537,384.80 = 228,375.39 : x
  2. Step 2: Convert to fraction form
    389,404.20/537,384.80 = 228,375.39/x
  3. Step 3: Cross multiply
    389,404.20x = 537,384.80 × 228,375.39
  4. Step 4: Simplify right side
    389,404.20x = 122,725,465,009.80
  5. Step 5: Solve for x
    x = 122,725,465,009.80/389,404.20
  6. Step 6: Final answer
    x = 315,162.15

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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.