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Finding the Fourth Proportional to 521,988.71, 720,332.39 and 304,183.55

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Solution

The fourth proportional to 521,988.71, 720,332.39 and 304,183.55 is: 419,766.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,988.71 : 720,332.39 = 304,183.55 : x
  2. Step 2: Convert to fraction form
    521,988.71/720,332.39 = 304,183.55/x
  3. Step 3: Cross multiply
    521,988.71x = 720,332.39 × 304,183.55
  4. Step 4: Simplify right side
    521,988.71x = 219,113,266,131.47
  5. Step 5: Solve for x
    x = 219,113,266,131.47/521,988.71
  6. Step 6: Final answer
    x = 419,766.30

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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.