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Finding the Fourth Proportional to 809.69, 1,117.61 and 700.34

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Solution

The fourth proportional to 809.69, 1,117.61 and 700.34 is: 966.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.69 : 1,117.61 = 700.34 : x
  2. Step 2: Convert to fraction form
    809.69/1,117.61 = 700.34/x
  3. Step 3: Cross multiply
    809.69x = 1,117.61 × 700.34
  4. Step 4: Simplify right side
    809.69x = 782,706.99
  5. Step 5: Solve for x
    x = 782,706.99/809.69
  6. Step 6: Final answer
    x = 966.67

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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.