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Finding the Fourth Proportional to 528,006.80, 790,843.80 and 212,301.20

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Solution

The fourth proportional to 528,006.80, 790,843.80 and 212,301.20 is: 317,982.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,006.80 : 790,843.80 = 212,301.20 : x
  2. Step 2: Convert to fraction form
    528,006.80/790,843.80 = 212,301.20/x
  3. Step 3: Cross multiply
    528,006.80x = 790,843.80 × 212,301.20
  4. Step 4: Simplify right side
    528,006.80x = 167,897,087,752.56
  5. Step 5: Solve for x
    x = 167,897,087,752.56/528,006.80
  6. Step 6: Final answer
    x = 317,982.81

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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.