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Finding the Fourth Proportional to 863.73, 1,191.95 and 509.67

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Solution

The fourth proportional to 863.73, 1,191.95 and 509.67 is: 703.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.73 : 1,191.95 = 509.67 : x
  2. Step 2: Convert to fraction form
    863.73/1,191.95 = 509.67/x
  3. Step 3: Cross multiply
    863.73x = 1,191.95 × 509.67
  4. Step 4: Simplify right side
    863.73x = 607,498.61
  5. Step 5: Solve for x
    x = 607,498.61/863.73
  6. Step 6: Final answer
    x = 703.34

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Double scale
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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.