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Finding the Fourth Proportional to 388,188.72, 535,910.70 and 272,258.21

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Solution

The fourth proportional to 388,188.72, 535,910.70 and 272,258.21 is: 375,863.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,188.72 : 535,910.70 = 272,258.21 : x
  2. Step 2: Convert to fraction form
    388,188.72/535,910.70 = 272,258.21/x
  3. Step 3: Cross multiply
    388,188.72x = 535,910.70 × 272,258.21
  4. Step 4: Simplify right side
    388,188.72x = 145,906,087,901.85
  5. Step 5: Solve for x
    x = 145,906,087,901.85/388,188.72
  6. Step 6: Final answer
    x = 375,863.80

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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.