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Finding the Fourth Proportional to 470.40, 705.54 and 177.90

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Solution

The fourth proportional to 470.40, 705.54 and 177.90 is: 266.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.40 : 705.54 = 177.90 : x
  2. Step 2: Convert to fraction form
    470.40/705.54 = 177.90/x
  3. Step 3: Cross multiply
    470.40x = 705.54 × 177.90
  4. Step 4: Simplify right side
    470.40x = 125,515.57
  5. Step 5: Solve for x
    x = 125,515.57/470.40
  6. Step 6: Final answer
    x = 266.83

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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.