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Finding the Fourth Proportional to 940.70, 1,411.12 and 316.09

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Solution

The fourth proportional to 940.70, 1,411.12 and 316.09 is: 474.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.70 : 1,411.12 = 316.09 : x
  2. Step 2: Convert to fraction form
    940.70/1,411.12 = 316.09/x
  3. Step 3: Cross multiply
    940.70x = 1,411.12 × 316.09
  4. Step 4: Simplify right side
    940.70x = 446,040.92
  5. Step 5: Solve for x
    x = 446,040.92/940.70
  6. Step 6: Final answer
    x = 474.16

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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.