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Finding the Fourth Proportional to 1,790.47, 2,685.17 and 694.57

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Solution

The fourth proportional to 1,790.47, 2,685.17 and 694.57 is: 1,041.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.47 : 2,685.17 = 694.57 : x
  2. Step 2: Convert to fraction form
    1,790.47/2,685.17 = 694.57/x
  3. Step 3: Cross multiply
    1,790.47x = 2,685.17 × 694.57
  4. Step 4: Simplify right side
    1,790.47x = 1,865,038.53
  5. Step 5: Solve for x
    x = 1,865,038.53/1,790.47
  6. Step 6: Final answer
    x = 1,041.65

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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.