Home / 457,243.20-685,864.80-289,281.60

Finding the Fourth Proportional to 457,243.20, 685,864.80 and 289,281.60

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Solution

The fourth proportional to 457,243.20, 685,864.80 and 289,281.60 is: 433,922.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,243.20 : 685,864.80 = 289,281.60 : x
  2. Step 2: Convert to fraction form
    457,243.20/685,864.80 = 289,281.60/x
  3. Step 3: Cross multiply
    457,243.20x = 685,864.80 × 289,281.60
  4. Step 4: Simplify right side
    457,243.20x = 198,408,066,727.68
  5. Step 5: Solve for x
    x = 198,408,066,727.68/457,243.20
  6. Step 6: Final answer
    x = 433,922.40

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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.