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Finding the Fourth Proportional to 602.61, 903.31 and 278.21

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Solution

The fourth proportional to 602.61, 903.31 and 278.21 is: 417.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.61 : 903.31 = 278.21 : x
  2. Step 2: Convert to fraction form
    602.61/903.31 = 278.21/x
  3. Step 3: Cross multiply
    602.61x = 903.31 × 278.21
  4. Step 4: Simplify right side
    602.61x = 251,304.66
  5. Step 5: Solve for x
    x = 251,304.66/602.61
  6. Step 6: Final answer
    x = 417.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.