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Finding the Fourth Proportional to 1,807.05, 2,710.37 and 636.80

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Solution

The fourth proportional to 1,807.05, 2,710.37 and 636.80 is: 955.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,807.05 : 2,710.37 = 636.80 : x
  2. Step 2: Convert to fraction form
    1,807.05/2,710.37 = 636.80/x
  3. Step 3: Cross multiply
    1,807.05x = 2,710.37 × 636.80
  4. Step 4: Simplify right side
    1,807.05x = 1,725,960.43
  5. Step 5: Solve for x
    x = 1,725,960.43/1,807.05
  6. Step 6: Final answer
    x = 955.13

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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.