Home / 457,279.20-685,918.80-289,317.60

Finding the Fourth Proportional to 457,279.20, 685,918.80 and 289,317.60

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Solution

The fourth proportional to 457,279.20, 685,918.80 and 289,317.60 is: 433,976.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,279.20 : 685,918.80 = 289,317.60 : x
  2. Step 2: Convert to fraction form
    457,279.20/685,918.80 = 289,317.60/x
  3. Step 3: Cross multiply
    457,279.20x = 685,918.80 × 289,317.60
  4. Step 4: Simplify right side
    457,279.20x = 198,448,381,010.88
  5. Step 5: Solve for x
    x = 198,448,381,010.88/457,279.20
  6. Step 6: Final answer
    x = 433,976.40

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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.