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Finding the Fourth Proportional to 902.98, 1,354.47 and 253.72

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Solution

The fourth proportional to 902.98, 1,354.47 and 253.72 is: 380.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.98 : 1,354.47 = 253.72 : x
  2. Step 2: Convert to fraction form
    902.98/1,354.47 = 253.72/x
  3. Step 3: Cross multiply
    902.98x = 1,354.47 × 253.72
  4. Step 4: Simplify right side
    902.98x = 343,656.13
  5. Step 5: Solve for x
    x = 343,656.13/902.98
  6. Step 6: Final answer
    x = 380.58

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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.