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Finding the Fourth Proportional to 1,069.17, 1,603.50 and 410.82

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Solution

The fourth proportional to 1,069.17, 1,603.50 and 410.82 is: 616.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.17 : 1,603.50 = 410.82 : x
  2. Step 2: Convert to fraction form
    1,069.17/1,603.50 = 410.82/x
  3. Step 3: Cross multiply
    1,069.17x = 1,603.50 × 410.82
  4. Step 4: Simplify right side
    1,069.17x = 658,749.87
  5. Step 5: Solve for x
    x = 658,749.87/1,069.17
  6. Step 6: Final answer
    x = 616.13

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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.