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Finding the Fourth Proportional to 520.30, 718.14 and 299.38

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Solution

The fourth proportional to 520.30, 718.14 and 299.38 is: 413.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.30 : 718.14 = 299.38 : x
  2. Step 2: Convert to fraction form
    520.30/718.14 = 299.38/x
  3. Step 3: Cross multiply
    520.30x = 718.14 × 299.38
  4. Step 4: Simplify right side
    520.30x = 214,996.75
  5. Step 5: Solve for x
    x = 214,996.75/520.30
  6. Step 6: Final answer
    x = 413.22

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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.