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Finding the Fourth Proportional to 1,637.70, 2,455.83 and 636.90

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Solution

The fourth proportional to 1,637.70, 2,455.83 and 636.90 is: 955.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,637.70 : 2,455.83 = 636.90 : x
  2. Step 2: Convert to fraction form
    1,637.70/2,455.83 = 636.90/x
  3. Step 3: Cross multiply
    1,637.70x = 2,455.83 × 636.90
  4. Step 4: Simplify right side
    1,637.70x = 1,564,108.92
  5. Step 5: Solve for x
    x = 1,564,108.92/1,637.70
  6. Step 6: Final answer
    x = 955.07

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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.