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Finding the Fourth Proportional to 548.74, 756.99 and 511.15

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Solution

The fourth proportional to 548.74, 756.99 and 511.15 is: 705.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.74 : 756.99 = 511.15 : x
  2. Step 2: Convert to fraction form
    548.74/756.99 = 511.15/x
  3. Step 3: Cross multiply
    548.74x = 756.99 × 511.15
  4. Step 4: Simplify right side
    548.74x = 386,935.44
  5. Step 5: Solve for x
    x = 386,935.44/548.74
  6. Step 6: Final answer
    x = 705.13

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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.