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Finding the Fourth Proportional to 489,420.12, 675,404.37 and 274,564.79

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Solution

The fourth proportional to 489,420.12, 675,404.37 and 274,564.79 is: 378,902.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,420.12 : 675,404.37 = 274,564.79 : x
  2. Step 2: Convert to fraction form
    489,420.12/675,404.37 = 274,564.79/x
  3. Step 3: Cross multiply
    489,420.12x = 675,404.37 × 274,564.79
  4. Step 4: Simplify right side
    489,420.12x = 185,442,260,247.03
  5. Step 5: Solve for x
    x = 185,442,260,247.03/489,420.12
  6. Step 6: Final answer
    x = 378,902.00

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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.