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Finding the Fourth Proportional to 520.49, 718.25 and 299.45

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Solution

The fourth proportional to 520.49, 718.25 and 299.45 is: 413.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.49 : 718.25 = 299.45 : x
  2. Step 2: Convert to fraction form
    520.49/718.25 = 299.45/x
  3. Step 3: Cross multiply
    520.49x = 718.25 × 299.45
  4. Step 4: Simplify right side
    520.49x = 215,080.26
  5. Step 5: Solve for x
    x = 215,080.26/520.49
  6. Step 6: Final answer
    x = 413.22

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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.