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Finding the Fourth Proportional to 1,810.45, 2,715.40 and 699.71

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Solution

The fourth proportional to 1,810.45, 2,715.40 and 699.71 is: 1,049.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,810.45 : 2,715.40 = 699.71 : x
  2. Step 2: Convert to fraction form
    1,810.45/2,715.40 = 699.71/x
  3. Step 3: Cross multiply
    1,810.45x = 2,715.40 × 699.71
  4. Step 4: Simplify right side
    1,810.45x = 1,899,989.04
  5. Step 5: Solve for x
    x = 1,899,989.04/1,810.45
  6. Step 6: Final answer
    x = 1,049.46

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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.