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Finding the Fourth Proportional to 521.03, 718.95 and 299.99

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Solution

The fourth proportional to 521.03, 718.95 and 299.99 is: 413.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.03 : 718.95 = 299.99 : x
  2. Step 2: Convert to fraction form
    521.03/718.95 = 299.99/x
  3. Step 3: Cross multiply
    521.03x = 718.95 × 299.99
  4. Step 4: Simplify right side
    521.03x = 215,680.73
  5. Step 5: Solve for x
    x = 215,680.73/521.03
  6. Step 6: Final answer
    x = 413.95

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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.