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Finding the Fourth Proportional to 386,414.80, 520,001.10 and 386,414.80

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Solution

The fourth proportional to 386,414.80, 520,001.10 and 386,414.80 is: 520,001.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,414.80 : 520,001.10 = 386,414.80 : x
  2. Step 2: Convert to fraction form
    386,414.80/520,001.10 = 386,414.80/x
  3. Step 3: Cross multiply
    386,414.80x = 520,001.10 × 386,414.80
  4. Step 4: Simplify right side
    386,414.80x = 200,936,121,056.28
  5. Step 5: Solve for x
    x = 200,936,121,056.28/386,414.80
  6. Step 6: Final answer
    x = 520,001.10

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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.