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Finding the Fourth Proportional to 516.54, 774.81 and 430.14

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Solution

The fourth proportional to 516.54, 774.81 and 430.14 is: 645.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.54 : 774.81 = 430.14 : x
  2. Step 2: Convert to fraction form
    516.54/774.81 = 430.14/x
  3. Step 3: Cross multiply
    516.54x = 774.81 × 430.14
  4. Step 4: Simplify right side
    516.54x = 333,276.77
  5. Step 5: Solve for x
    x = 333,276.77/516.54
  6. Step 6: Final answer
    x = 645.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.