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Finding the Fourth Proportional to 1,794.02, 2,690.62 and 639.77

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Solution

The fourth proportional to 1,794.02, 2,690.62 and 639.77 is: 959.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,794.02 : 2,690.62 = 639.77 : x
  2. Step 2: Convert to fraction form
    1,794.02/2,690.62 = 639.77/x
  3. Step 3: Cross multiply
    1,794.02x = 2,690.62 × 639.77
  4. Step 4: Simplify right side
    1,794.02x = 1,721,362.90
  5. Step 5: Solve for x
    x = 1,721,362.90/1,794.02
  6. Step 6: Final answer
    x = 959.50

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1.5x scale

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.