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Finding the Fourth Proportional to 539,158.20, 808,218.90 and 419,148.60

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Solution

The fourth proportional to 539,158.20, 808,218.90 and 419,148.60 is: 628,319.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,158.20 : 808,218.90 = 419,148.60 : x
  2. Step 2: Convert to fraction form
    539,158.20/808,218.90 = 419,148.60/x
  3. Step 3: Cross multiply
    539,158.20x = 808,218.90 × 419,148.60
  4. Step 4: Simplify right side
    539,158.20x = 338,763,820,428.54
  5. Step 5: Solve for x
    x = 338,763,820,428.54/539,158.20
  6. Step 6: Final answer
    x = 628,319.89

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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.