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Finding the Fourth Proportional to 1,120.01, 1,545.70 and 622.69

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Solution

The fourth proportional to 1,120.01, 1,545.70 and 622.69 is: 859.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.01 : 1,545.70 = 622.69 : x
  2. Step 2: Convert to fraction form
    1,120.01/1,545.70 = 622.69/x
  3. Step 3: Cross multiply
    1,120.01x = 1,545.70 × 622.69
  4. Step 4: Simplify right side
    1,120.01x = 962,491.93
  5. Step 5: Solve for x
    x = 962,491.93/1,120.01
  6. Step 6: Final answer
    x = 859.36

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1.5x scale

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.