Home / 457,278.20-685,917.30-289,316.60

Finding the Fourth Proportional to 457,278.20, 685,917.30 and 289,316.60

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Solution

The fourth proportional to 457,278.20, 685,917.30 and 289,316.60 is: 433,974.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,278.20 : 685,917.30 = 289,316.60 : x
  2. Step 2: Convert to fraction form
    457,278.20/685,917.30 = 289,316.60/x
  3. Step 3: Cross multiply
    457,278.20x = 685,917.30 × 289,316.60
  4. Step 4: Simplify right side
    457,278.20x = 198,447,261,117.18
  5. Step 5: Solve for x
    x = 198,447,261,117.18/457,278.20
  6. Step 6: Final answer
    x = 433,974.90

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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.