Home / 651,211.20-976,816.80-438,634.80

Finding the Fourth Proportional to 651,211.20, 976,816.80 and 438,634.80

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Solution

The fourth proportional to 651,211.20, 976,816.80 and 438,634.80 is: 657,952.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,211.20 : 976,816.80 = 438,634.80 : x
  2. Step 2: Convert to fraction form
    651,211.20/976,816.80 = 438,634.80/x
  3. Step 3: Cross multiply
    651,211.20x = 976,816.80 × 438,634.80
  4. Step 4: Simplify right side
    651,211.20x = 428,465,841,704.64
  5. Step 5: Solve for x
    x = 428,465,841,704.64/651,211.20
  6. Step 6: Final answer
    x = 657,952.20

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Double scale
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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.