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Finding the Fourth Proportional to 1,068.39, 1,602.78 and 491.25

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Solution

The fourth proportional to 1,068.39, 1,602.78 and 491.25 is: 736.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,068.39 : 1,602.78 = 491.25 : x
  2. Step 2: Convert to fraction form
    1,068.39/1,602.78 = 491.25/x
  3. Step 3: Cross multiply
    1,068.39x = 1,602.78 × 491.25
  4. Step 4: Simplify right side
    1,068.39x = 787,365.68
  5. Step 5: Solve for x
    x = 787,365.68/1,068.39
  6. Step 6: Final answer
    x = 736.96

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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.