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Finding the Fourth Proportional to 648,221.80, 971,987.10 and 273,821.80

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Solution

The fourth proportional to 648,221.80, 971,987.10 and 273,821.80 is: 410,586.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,221.80 : 971,987.10 = 273,821.80 : x
  2. Step 2: Convert to fraction form
    648,221.80/971,987.10 = 273,821.80/x
  3. Step 3: Cross multiply
    648,221.80x = 971,987.10 × 273,821.80
  4. Step 4: Simplify right side
    648,221.80x = 266,151,257,298.78
  5. Step 5: Solve for x
    x = 266,151,257,298.78/648,221.80
  6. Step 6: Final answer
    x = 410,586.71

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Double scale
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1.5x scale

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.