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Finding the Fourth Proportional to 548.59, 756.88 and 315.67

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Solution

The fourth proportional to 548.59, 756.88 and 315.67 is: 435.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.59 : 756.88 = 315.67 : x
  2. Step 2: Convert to fraction form
    548.59/756.88 = 315.67/x
  3. Step 3: Cross multiply
    548.59x = 756.88 × 315.67
  4. Step 4: Simplify right side
    548.59x = 238,924.31
  5. Step 5: Solve for x
    x = 238,924.31/548.59
  6. Step 6: Final answer
    x = 435.52

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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.