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Finding the Fourth Proportional to 701.36, 1,051.32 and 316.88

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Solution

The fourth proportional to 701.36, 1,051.32 and 316.88 is: 474.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.36 : 1,051.32 = 316.88 : x
  2. Step 2: Convert to fraction form
    701.36/1,051.32 = 316.88/x
  3. Step 3: Cross multiply
    701.36x = 1,051.32 × 316.88
  4. Step 4: Simplify right side
    701.36x = 333,142.28
  5. Step 5: Solve for x
    x = 333,142.28/701.36
  6. Step 6: Final answer
    x = 474.99

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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.