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Finding the Fourth Proportional to 521,892.21, 720,199.05 and 307,046.11

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Solution

The fourth proportional to 521,892.21, 720,199.05 and 307,046.11 is: 423,716.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,892.21 : 720,199.05 = 307,046.11 : x
  2. Step 2: Convert to fraction form
    521,892.21/720,199.05 = 307,046.11/x
  3. Step 3: Cross multiply
    521,892.21x = 720,199.05 × 307,046.11
  4. Step 4: Simplify right side
    521,892.21x = 221,134,313,127.20
  5. Step 5: Solve for x
    x = 221,134,313,127.20/521,892.21
  6. Step 6: Final answer
    x = 423,716.45

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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.