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Finding the Fourth Proportional to 528,070.20, 792,105.30 and 261,871.80

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Solution

The fourth proportional to 528,070.20, 792,105.30 and 261,871.80 is: 392,807.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,070.20 : 792,105.30 = 261,871.80 : x
  2. Step 2: Convert to fraction form
    528,070.20/792,105.30 = 261,871.80/x
  3. Step 3: Cross multiply
    528,070.20x = 792,105.30 × 261,871.80
  4. Step 4: Simplify right side
    528,070.20x = 207,430,040,700.54
  5. Step 5: Solve for x
    x = 207,430,040,700.54/528,070.20
  6. Step 6: Final answer
    x = 392,807.70

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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.