Home / 865,986.60-1,298,979.90-305,077.80

Finding the Fourth Proportional to 865,986.60, 1,298,979.90 and 305,077.80

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Solution

The fourth proportional to 865,986.60, 1,298,979.90 and 305,077.80 is: 457,616.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,986.60 : 1,298,979.90 = 305,077.80 : x
  2. Step 2: Convert to fraction form
    865,986.60/1,298,979.90 = 305,077.80/x
  3. Step 3: Cross multiply
    865,986.60x = 1,298,979.90 × 305,077.80
  4. Step 4: Simplify right side
    865,986.60x = 396,289,930,136.22
  5. Step 5: Solve for x
    x = 396,289,930,136.22/865,986.60
  6. Step 6: Final answer
    x = 457,616.70

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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.