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Finding the Fourth Proportional to 1,073.39, 1,605.64 and 1,007.78

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Solution

The fourth proportional to 1,073.39, 1,605.64 and 1,007.78 is: 1,507.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,073.39 : 1,605.64 = 1,007.78 : x
  2. Step 2: Convert to fraction form
    1,073.39/1,605.64 = 1,007.78/x
  3. Step 3: Cross multiply
    1,073.39x = 1,605.64 × 1,007.78
  4. Step 4: Simplify right side
    1,073.39x = 1,618,126.84
  5. Step 5: Solve for x
    x = 1,618,126.84/1,073.39
  6. Step 6: Final answer
    x = 1,507.49

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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.