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Finding the Fourth Proportional to 520,903.80, 781,202.10 and 205,255.80

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Solution

The fourth proportional to 520,903.80, 781,202.10 and 205,255.80 is: 307,823.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,903.80 : 781,202.10 = 205,255.80 : x
  2. Step 2: Convert to fraction form
    520,903.80/781,202.10 = 205,255.80/x
  3. Step 3: Cross multiply
    520,903.80x = 781,202.10 × 205,255.80
  4. Step 4: Simplify right side
    520,903.80x = 160,346,261,997.18
  5. Step 5: Solve for x
    x = 160,346,261,997.18/520,903.80
  6. Step 6: Final answer
    x = 307,823.18

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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.