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Finding the Fourth Proportional to 1,793.70, 2,690.55 and 561.12

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Solution

The fourth proportional to 1,793.70, 2,690.55 and 561.12 is: 841.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,793.70 : 2,690.55 = 561.12 : x
  2. Step 2: Convert to fraction form
    1,793.70/2,690.55 = 561.12/x
  3. Step 3: Cross multiply
    1,793.70x = 2,690.55 × 561.12
  4. Step 4: Simplify right side
    1,793.70x = 1,509,721.42
  5. Step 5: Solve for x
    x = 1,509,721.42/1,793.70
  6. Step 6: Final answer
    x = 841.68

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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.