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Finding the Fourth Proportional to 521,900.53, 720,210.49 and 307,054.42

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Solution

The fourth proportional to 521,900.53, 720,210.49 and 307,054.42 is: 423,727.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,900.53 : 720,210.49 = 307,054.42 : x
  2. Step 2: Convert to fraction form
    521,900.53/720,210.49 = 307,054.42/x
  3. Step 3: Cross multiply
    521,900.53x = 720,210.49 × 307,054.42
  4. Step 4: Simplify right side
    521,900.53x = 221,143,811,716.70
  5. Step 5: Solve for x
    x = 221,143,811,716.70/521,900.53
  6. Step 6: Final answer
    x = 423,727.89

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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.