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Finding the Fourth Proportional to 548.09, 756.38 and 312.07

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Solution

The fourth proportional to 548.09, 756.38 and 312.07 is: 430.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.09 : 756.38 = 312.07 : x
  2. Step 2: Convert to fraction form
    548.09/756.38 = 312.07/x
  3. Step 3: Cross multiply
    548.09x = 756.38 × 312.07
  4. Step 4: Simplify right side
    548.09x = 236,038.43
  5. Step 5: Solve for x
    x = 236,038.43/548.09
  6. Step 6: Final answer
    x = 430.66

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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.