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Finding the Fourth Proportional to 699,299.47, 965,005.23 and 393,381.91

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Solution

The fourth proportional to 699,299.47, 965,005.23 and 393,381.91 is: 542,851.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,299.47 : 965,005.23 = 393,381.91 : x
  2. Step 2: Convert to fraction form
    699,299.47/965,005.23 = 393,381.91/x
  3. Step 3: Cross multiply
    699,299.47x = 965,005.23 × 393,381.91
  4. Step 4: Simplify right side
    699,299.47x = 379,615,600,537.39
  5. Step 5: Solve for x
    x = 379,615,600,537.39/699,299.47
  6. Step 6: Final answer
    x = 542,851.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.