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Finding the Fourth Proportional to 489,800.40, 735,132.60 and 289,870.80

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Solution

The fourth proportional to 489,800.40, 735,132.60 and 289,870.80 is: 435,061.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,800.40 : 735,132.60 = 289,870.80 : x
  2. Step 2: Convert to fraction form
    489,800.40/735,132.60 = 289,870.80/x
  3. Step 3: Cross multiply
    489,800.40x = 735,132.60 × 289,870.80
  4. Step 4: Simplify right side
    489,800.40x = 213,093,474,868.08
  5. Step 5: Solve for x
    x = 213,093,474,868.08/489,800.40
  6. Step 6: Final answer
    x = 435,061.86

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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.