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Finding the Fourth Proportional to 521,912.80, 720,227.46 and 307,066.69

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Solution

The fourth proportional to 521,912.80, 720,227.46 and 307,066.69 is: 423,744.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,912.80 : 720,227.46 = 307,066.69 : x
  2. Step 2: Convert to fraction form
    521,912.80/720,227.46 = 307,066.69/x
  3. Step 3: Cross multiply
    521,912.80x = 720,227.46 × 307,066.69
  4. Step 4: Simplify right side
    521,912.80x = 221,157,862,189.31
  5. Step 5: Solve for x
    x = 221,157,862,189.31/521,912.80
  6. Step 6: Final answer
    x = 423,744.85

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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.