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Finding the Fourth Proportional to 1,336.74, 2,005.20 and 470.76

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Solution

The fourth proportional to 1,336.74, 2,005.20 and 470.76 is: 706.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.74 : 2,005.20 = 470.76 : x
  2. Step 2: Convert to fraction form
    1,336.74/2,005.20 = 470.76/x
  3. Step 3: Cross multiply
    1,336.74x = 2,005.20 × 470.76
  4. Step 4: Simplify right side
    1,336.74x = 943,967.95
  5. Step 5: Solve for x
    x = 943,967.95/1,336.74
  6. Step 6: Final answer
    x = 706.17

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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.