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Finding the Fourth Proportional to 1,119.66, 1,545.15 and 622.35

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Solution

The fourth proportional to 1,119.66, 1,545.15 and 622.35 is: 858.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.66 : 1,545.15 = 622.35 : x
  2. Step 2: Convert to fraction form
    1,119.66/1,545.15 = 622.35/x
  3. Step 3: Cross multiply
    1,119.66x = 1,545.15 × 622.35
  4. Step 4: Simplify right side
    1,119.66x = 961,624.10
  5. Step 5: Solve for x
    x = 961,624.10/1,119.66
  6. Step 6: Final answer
    x = 858.85

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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.