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Finding the Fourth Proportional to 489,679.80, 734,519.70 and 486,569.40

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Solution

The fourth proportional to 489,679.80, 734,519.70 and 486,569.40 is: 729,854.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,679.80 : 734,519.70 = 486,569.40 : x
  2. Step 2: Convert to fraction form
    489,679.80/734,519.70 = 486,569.40/x
  3. Step 3: Cross multiply
    489,679.80x = 734,519.70 × 486,569.40
  4. Step 4: Simplify right side
    489,679.80x = 357,394,809,717.18
  5. Step 5: Solve for x
    x = 357,394,809,717.18/489,679.80
  6. Step 6: Final answer
    x = 729,854.10

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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.