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Finding the Fourth Proportional to 1,790.87, 2,685.58 and 557.90

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Solution

The fourth proportional to 1,790.87, 2,685.58 and 557.90 is: 836.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.87 : 2,685.58 = 557.90 : x
  2. Step 2: Convert to fraction form
    1,790.87/2,685.58 = 557.90/x
  3. Step 3: Cross multiply
    1,790.87x = 2,685.58 × 557.90
  4. Step 4: Simplify right side
    1,790.87x = 1,498,270.26
  5. Step 5: Solve for x
    x = 1,498,270.26/1,790.87
  6. Step 6: Final answer
    x = 836.62

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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.