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Finding the Fourth Proportional to 439,523.70, 659,285.55 and 214,918.80

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Solution

The fourth proportional to 439,523.70, 659,285.55 and 214,918.80 is: 322,378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,523.70 : 659,285.55 = 214,918.80 : x
  2. Step 2: Convert to fraction form
    439,523.70/659,285.55 = 214,918.80/x
  3. Step 3: Cross multiply
    439,523.70x = 659,285.55 × 214,918.80
  4. Step 4: Simplify right side
    439,523.70x = 141,692,859,263.34
  5. Step 5: Solve for x
    x = 141,692,859,263.34/439,523.70
  6. Step 6: Final answer
    x = 322,378.20

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Similar ratio
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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.