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Finding the Fourth Proportional to 516.70, 776.13 and 435.70

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Solution

The fourth proportional to 516.70, 776.13 and 435.70 is: 654.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.70 : 776.13 = 435.70 : x
  2. Step 2: Convert to fraction form
    516.70/776.13 = 435.70/x
  3. Step 3: Cross multiply
    516.70x = 776.13 × 435.70
  4. Step 4: Simplify right side
    516.70x = 338,159.84
  5. Step 5: Solve for x
    x = 338,159.84/516.70
  6. Step 6: Final answer
    x = 654.46

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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.