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Finding the Fourth Proportional to 863.07, 1,191.05 and 470.09

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Solution

The fourth proportional to 863.07, 1,191.05 and 470.09 is: 648.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.07 : 1,191.05 = 470.09 : x
  2. Step 2: Convert to fraction form
    863.07/1,191.05 = 470.09/x
  3. Step 3: Cross multiply
    863.07x = 1,191.05 × 470.09
  4. Step 4: Simplify right side
    863.07x = 559,900.69
  5. Step 5: Solve for x
    x = 559,900.69/863.07
  6. Step 6: Final answer
    x = 648.73

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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.