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Finding the Fourth Proportional to 655.31, 904.50 and 419.24

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Solution

The fourth proportional to 655.31, 904.50 and 419.24 is: 578.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.31 : 904.50 = 419.24 : x
  2. Step 2: Convert to fraction form
    655.31/904.50 = 419.24/x
  3. Step 3: Cross multiply
    655.31x = 904.50 × 419.24
  4. Step 4: Simplify right side
    655.31x = 379,198.06
  5. Step 5: Solve for x
    x = 379,198.06/655.31
  6. Step 6: Final answer
    x = 578.66

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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.