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Finding the Fourth Proportional to 460,864.80, 691,329.60 and 261,280.80

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Solution

The fourth proportional to 460,864.80, 691,329.60 and 261,280.80 is: 391,939.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    460,864.80 : 691,329.60 = 261,280.80 : x
  2. Step 2: Convert to fraction form
    460,864.80/691,329.60 = 261,280.80/x
  3. Step 3: Cross multiply
    460,864.80x = 691,329.60 × 261,280.80
  4. Step 4: Simplify right side
    460,864.80x = 180,631,150,951.68
  5. Step 5: Solve for x
    x = 180,631,150,951.68/460,864.80
  6. Step 6: Final answer
    x = 391,939.57

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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.