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Finding the Fourth Proportional to 386,416.80, 520,003.80 and 386,416.80

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Solution

The fourth proportional to 386,416.80, 520,003.80 and 386,416.80 is: 520,003.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,416.80 : 520,003.80 = 386,416.80 : x
  2. Step 2: Convert to fraction form
    386,416.80/520,003.80 = 386,416.80/x
  3. Step 3: Cross multiply
    386,416.80x = 520,003.80 × 386,416.80
  4. Step 4: Simplify right side
    386,416.80x = 200,938,204,383.84
  5. Step 5: Solve for x
    x = 200,938,204,383.84/386,416.80
  6. Step 6: Final answer
    x = 520,003.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.