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Finding the Fourth Proportional to 940.92, 1,412.19 and 652.56

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Solution

The fourth proportional to 940.92, 1,412.19 and 652.56 is: 979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.92 : 1,412.19 = 652.56 : x
  2. Step 2: Convert to fraction form
    940.92/1,412.19 = 652.56/x
  3. Step 3: Cross multiply
    940.92x = 1,412.19 × 652.56
  4. Step 4: Simplify right side
    940.92x = 921,538.71
  5. Step 5: Solve for x
    x = 921,538.71/940.92
  6. Step 6: Final answer
    x = 979.40

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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.