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Finding the Fourth Proportional to 1,294.34, 1,938.60 and 927.99

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Solution

The fourth proportional to 1,294.34, 1,938.60 and 927.99 is: 1,389.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.34 : 1,938.60 = 927.99 : x
  2. Step 2: Convert to fraction form
    1,294.34/1,938.60 = 927.99/x
  3. Step 3: Cross multiply
    1,294.34x = 1,938.60 × 927.99
  4. Step 4: Simplify right side
    1,294.34x = 1,799,001.41
  5. Step 5: Solve for x
    x = 1,799,001.41/1,294.34
  6. Step 6: Final answer
    x = 1,389.90

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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.