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Finding the Fourth Proportional to 1,051.29, 1,449.68 and 902.45

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Solution

The fourth proportional to 1,051.29, 1,449.68 and 902.45 is: 1,244.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.29 : 1,449.68 = 902.45 : x
  2. Step 2: Convert to fraction form
    1,051.29/1,449.68 = 902.45/x
  3. Step 3: Cross multiply
    1,051.29x = 1,449.68 × 902.45
  4. Step 4: Simplify right side
    1,051.29x = 1,308,269.60
  5. Step 5: Solve for x
    x = 1,308,269.60/1,051.29
  6. Step 6: Final answer
    x = 1,244.44

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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.