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Finding the Fourth Proportional to 1,119.51, 1,545.01 and 622.19

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Solution

The fourth proportional to 1,119.51, 1,545.01 and 622.19 is: 858.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.51 : 1,545.01 = 622.19 : x
  2. Step 2: Convert to fraction form
    1,119.51/1,545.01 = 622.19/x
  3. Step 3: Cross multiply
    1,119.51x = 1,545.01 × 622.19
  4. Step 4: Simplify right side
    1,119.51x = 961,289.77
  5. Step 5: Solve for x
    x = 961,289.77/1,119.51
  6. Step 6: Final answer
    x = 858.67

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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.