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Finding the Fourth Proportional to 1,394.71, 2,089.80 and 736.55

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Solution

The fourth proportional to 1,394.71, 2,089.80 and 736.55 is: 1,103.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.71 : 2,089.80 = 736.55 : x
  2. Step 2: Convert to fraction form
    1,394.71/2,089.80 = 736.55/x
  3. Step 3: Cross multiply
    1,394.71x = 2,089.80 × 736.55
  4. Step 4: Simplify right side
    1,394.71x = 1,539,242.19
  5. Step 5: Solve for x
    x = 1,539,242.19/1,394.71
  6. Step 6: Final answer
    x = 1,103.63

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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.