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Finding the Fourth Proportional to 1,091.82, 1,639.17 and 507.45

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Solution

The fourth proportional to 1,091.82, 1,639.17 and 507.45 is: 761.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.82 : 1,639.17 = 507.45 : x
  2. Step 2: Convert to fraction form
    1,091.82/1,639.17 = 507.45/x
  3. Step 3: Cross multiply
    1,091.82x = 1,639.17 × 507.45
  4. Step 4: Simplify right side
    1,091.82x = 831,796.82
  5. Step 5: Solve for x
    x = 831,796.82/1,091.82
  6. Step 6: Final answer
    x = 761.84

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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.