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Finding the Fourth Proportional to 655.78, 904.91 and 360.97

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Solution

The fourth proportional to 655.78, 904.91 and 360.97 is: 498.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.78 : 904.91 = 360.97 : x
  2. Step 2: Convert to fraction form
    655.78/904.91 = 360.97/x
  3. Step 3: Cross multiply
    655.78x = 904.91 × 360.97
  4. Step 4: Simplify right side
    655.78x = 326,645.36
  5. Step 5: Solve for x
    x = 326,645.36/655.78
  6. Step 6: Final answer
    x = 498.10

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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.