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Finding the Fourth Proportional to 1,089.81, 1,633.41 and 714.76

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Solution

The fourth proportional to 1,089.81, 1,633.41 and 714.76 is: 1,071.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.81 : 1,633.41 = 714.76 : x
  2. Step 2: Convert to fraction form
    1,089.81/1,633.41 = 714.76/x
  3. Step 3: Cross multiply
    1,089.81x = 1,633.41 × 714.76
  4. Step 4: Simplify right side
    1,089.81x = 1,167,492.05
  5. Step 5: Solve for x
    x = 1,167,492.05/1,089.81
  6. Step 6: Final answer
    x = 1,071.28

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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.