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Finding the Fourth Proportional to 516.00, 711.53 and 390.26

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Solution

The fourth proportional to 516.00, 711.53 and 390.26 is: 538.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.00 : 711.53 = 390.26 : x
  2. Step 2: Convert to fraction form
    516.00/711.53 = 390.26/x
  3. Step 3: Cross multiply
    516.00x = 711.53 × 390.26
  4. Step 4: Simplify right side
    516.00x = 277,678.14
  5. Step 5: Solve for x
    x = 277,678.14/516.00
  6. Step 6: Final answer
    x = 538.14

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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.