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Finding the Fourth Proportional to 655.31, 904.40 and 375.56

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Solution

The fourth proportional to 655.31, 904.40 and 375.56 is: 518.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.31 : 904.40 = 375.56 : x
  2. Step 2: Convert to fraction form
    655.31/904.40 = 375.56/x
  3. Step 3: Cross multiply
    655.31x = 904.40 × 375.56
  4. Step 4: Simplify right side
    655.31x = 339,650.06
  5. Step 5: Solve for x
    x = 339,650.06/655.31
  6. Step 6: Final answer
    x = 518.31

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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.