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Finding the Fourth Proportional to 1,810.70, 2,716.05 and 714.50

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Solution

The fourth proportional to 1,810.70, 2,716.05 and 714.50 is: 1,071.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,810.70 : 2,716.05 = 714.50 : x
  2. Step 2: Convert to fraction form
    1,810.70/2,716.05 = 714.50/x
  3. Step 3: Cross multiply
    1,810.70x = 2,716.05 × 714.50
  4. Step 4: Simplify right side
    1,810.70x = 1,940,617.73
  5. Step 5: Solve for x
    x = 1,940,617.73/1,810.70
  6. Step 6: Final answer
    x = 1,071.75

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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.