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Finding the Fourth Proportional to 548.07, 756.42 and 315.18

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Solution

The fourth proportional to 548.07, 756.42 and 315.18 is: 435.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.07 : 756.42 = 315.18 : x
  2. Step 2: Convert to fraction form
    548.07/756.42 = 315.18/x
  3. Step 3: Cross multiply
    548.07x = 756.42 × 315.18
  4. Step 4: Simplify right side
    548.07x = 238,408.46
  5. Step 5: Solve for x
    x = 238,408.46/548.07
  6. Step 6: Final answer
    x = 435.00

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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.