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Finding the Fourth Proportional to 455,207.20, 682,810.80 and 289,728.80

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Solution

The fourth proportional to 455,207.20, 682,810.80 and 289,728.80 is: 434,593.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,207.20 : 682,810.80 = 289,728.80 : x
  2. Step 2: Convert to fraction form
    455,207.20/682,810.80 = 289,728.80/x
  3. Step 3: Cross multiply
    455,207.20x = 682,810.80 × 289,728.80
  4. Step 4: Simplify right side
    455,207.20x = 197,829,953,711.04
  5. Step 5: Solve for x
    x = 197,829,953,711.04/455,207.20
  6. Step 6: Final answer
    x = 434,593.20

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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.