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Finding the Fourth Proportional to 1,089.35, 1,634.85 and 569.49

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Solution

The fourth proportional to 1,089.35, 1,634.85 and 569.49 is: 854.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.35 : 1,634.85 = 569.49 : x
  2. Step 2: Convert to fraction form
    1,089.35/1,634.85 = 569.49/x
  3. Step 3: Cross multiply
    1,089.35x = 1,634.85 × 569.49
  4. Step 4: Simplify right side
    1,089.35x = 931,024.60
  5. Step 5: Solve for x
    x = 931,024.60/1,089.35
  6. Step 6: Final answer
    x = 854.66

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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.