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Finding the Fourth Proportional to 489,680.80, 734,521.20 and 486,570.40

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Solution

The fourth proportional to 489,680.80, 734,521.20 and 486,570.40 is: 729,855.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,680.80 : 734,521.20 = 486,570.40 : x
  2. Step 2: Convert to fraction form
    489,680.80/734,521.20 = 486,570.40/x
  3. Step 3: Cross multiply
    489,680.80x = 734,521.20 × 486,570.40
  4. Step 4: Simplify right side
    489,680.80x = 357,396,274,092.48
  5. Step 5: Solve for x
    x = 357,396,274,092.48/489,680.80
  6. Step 6: Final answer
    x = 729,855.60

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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.