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Finding the Fourth Proportional to 391,453.74, 540,466.36 and 300,647.42

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Solution

The fourth proportional to 391,453.74, 540,466.36 and 300,647.42 is: 415,093.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,453.74 : 540,466.36 = 300,647.42 : x
  2. Step 2: Convert to fraction form
    391,453.74/540,466.36 = 300,647.42/x
  3. Step 3: Cross multiply
    391,453.74x = 540,466.36 × 300,647.42
  4. Step 4: Simplify right side
    391,453.74x = 162,489,816,730.79
  5. Step 5: Solve for x
    x = 162,489,816,730.79/391,453.74
  6. Step 6: Final answer
    x = 415,093.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.