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Finding the Fourth Proportional to 1,086.79, 1,628.97 and 470.79

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Solution

The fourth proportional to 1,086.79, 1,628.97 and 470.79 is: 705.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.79 : 1,628.97 = 470.79 : x
  2. Step 2: Convert to fraction form
    1,086.79/1,628.97 = 470.79/x
  3. Step 3: Cross multiply
    1,086.79x = 1,628.97 × 470.79
  4. Step 4: Simplify right side
    1,086.79x = 766,902.79
  5. Step 5: Solve for x
    x = 766,902.79/1,086.79
  6. Step 6: Final answer
    x = 705.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.