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Finding the Fourth Proportional to 619,381.54, 854,570.78 and 361,269.74

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Solution

The fourth proportional to 619,381.54, 854,570.78 and 361,269.74 is: 498,449.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,381.54 : 854,570.78 = 361,269.74 : x
  2. Step 2: Convert to fraction form
    619,381.54/854,570.78 = 361,269.74/x
  3. Step 3: Cross multiply
    619,381.54x = 854,570.78 × 361,269.74
  4. Step 4: Simplify right side
    619,381.54x = 308,730,563,502.20
  5. Step 5: Solve for x
    x = 308,730,563,502.20/619,381.54
  6. Step 6: Final answer
    x = 498,449.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.