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Finding the Fourth Proportional to 659.72, 910.54 and 394.18

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Solution

The fourth proportional to 659.72, 910.54 and 394.18 is: 544.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.72 : 910.54 = 394.18 : x
  2. Step 2: Convert to fraction form
    659.72/910.54 = 394.18/x
  3. Step 3: Cross multiply
    659.72x = 910.54 × 394.18
  4. Step 4: Simplify right side
    659.72x = 358,916.66
  5. Step 5: Solve for x
    x = 358,916.66/659.72
  6. Step 6: Final answer
    x = 544.04

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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.