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Finding the Fourth Proportional to 653,453.40, 980,180.10 and 387,076.80

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Solution

The fourth proportional to 653,453.40, 980,180.10 and 387,076.80 is: 580,615.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,453.40 : 980,180.10 = 387,076.80 : x
  2. Step 2: Convert to fraction form
    653,453.40/980,180.10 = 387,076.80/x
  3. Step 3: Cross multiply
    653,453.40x = 980,180.10 × 387,076.80
  4. Step 4: Simplify right side
    653,453.40x = 379,404,976,531.68
  5. Step 5: Solve for x
    x = 379,404,976,531.68/653,453.40
  6. Step 6: Final answer
    x = 580,615.20

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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.