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Finding the Fourth Proportional to 1,120.05, 1,545.64 and 622.66

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Solution

The fourth proportional to 1,120.05, 1,545.64 and 622.66 is: 859.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.05 : 1,545.64 = 622.66 : x
  2. Step 2: Convert to fraction form
    1,120.05/1,545.64 = 622.66/x
  3. Step 3: Cross multiply
    1,120.05x = 1,545.64 × 622.66
  4. Step 4: Simplify right side
    1,120.05x = 962,405.12
  5. Step 5: Solve for x
    x = 962,405.12/1,120.05
  6. Step 6: Final answer
    x = 859.25

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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.