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Finding the Fourth Proportional to 930.48, 1,392.17 and 814.07

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Solution

The fourth proportional to 930.48, 1,392.17 and 814.07 is: 1,217.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.48 : 1,392.17 = 814.07 : x
  2. Step 2: Convert to fraction form
    930.48/1,392.17 = 814.07/x
  3. Step 3: Cross multiply
    930.48x = 1,392.17 × 814.07
  4. Step 4: Simplify right side
    930.48x = 1,133,312.80
  5. Step 5: Solve for x
    x = 1,133,312.80/930.48
  6. Step 6: Final answer
    x = 1,217.99

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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.