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Finding the Fourth Proportional to 1,120.18, 1,545.70 and 622.72

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Solution

The fourth proportional to 1,120.18, 1,545.70 and 622.72 is: 859.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.18 : 1,545.70 = 622.72 : x
  2. Step 2: Convert to fraction form
    1,120.18/1,545.70 = 622.72/x
  3. Step 3: Cross multiply
    1,120.18x = 1,545.70 × 622.72
  4. Step 4: Simplify right side
    1,120.18x = 962,536.57
  5. Step 5: Solve for x
    x = 962,536.57/1,120.18
  6. Step 6: Final answer
    x = 859.27

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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.