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Finding the Fourth Proportional to 1,437.22, 1,983.36 and 816.22

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Solution

The fourth proportional to 1,437.22, 1,983.36 and 816.22 is: 1,126.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,437.22 : 1,983.36 = 816.22 : x
  2. Step 2: Convert to fraction form
    1,437.22/1,983.36 = 816.22/x
  3. Step 3: Cross multiply
    1,437.22x = 1,983.36 × 816.22
  4. Step 4: Simplify right side
    1,437.22x = 1,618,858.10
  5. Step 5: Solve for x
    x = 1,618,858.10/1,437.22
  6. Step 6: Final answer
    x = 1,126.38

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Double scale
Find fourth proportional to 1,438.22, 1,984.74 and 817.22
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.