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Finding the Fourth Proportional to 547,510.40, 820,876.80 and 210,420.80

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Solution

The fourth proportional to 547,510.40, 820,876.80 and 210,420.80 is: 315,481.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,510.40 : 820,876.80 = 210,420.80 : x
  2. Step 2: Convert to fraction form
    547,510.40/820,876.80 = 210,420.80/x
  3. Step 3: Cross multiply
    547,510.40x = 820,876.80 × 210,420.80
  4. Step 4: Simplify right side
    547,510.40x = 172,729,552,957.44
  5. Step 5: Solve for x
    x = 172,729,552,957.44/547,510.40
  6. Step 6: Final answer
    x = 315,481.78

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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.