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Finding the Fourth Proportional to 655.02, 903.75 and 389.39

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Solution

The fourth proportional to 655.02, 903.75 and 389.39 is: 537.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.02 : 903.75 = 389.39 : x
  2. Step 2: Convert to fraction form
    655.02/903.75 = 389.39/x
  3. Step 3: Cross multiply
    655.02x = 903.75 × 389.39
  4. Step 4: Simplify right side
    655.02x = 351,906.69
  5. Step 5: Solve for x
    x = 351,906.69/655.02
  6. Step 6: Final answer
    x = 537.25

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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.