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Finding the Fourth Proportional to 699,089.74, 964,631.74 and 393,165.17

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Solution

The fourth proportional to 699,089.74, 964,631.74 and 393,165.17 is: 542,504.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,089.74 : 964,631.74 = 393,165.17 : x
  2. Step 2: Convert to fraction form
    699,089.74/964,631.74 = 393,165.17/x
  3. Step 3: Cross multiply
    699,089.74x = 964,631.74 × 393,165.17
  4. Step 4: Simplify right side
    699,089.74x = 379,259,603,016.70
  5. Step 5: Solve for x
    x = 379,259,603,016.70/699,089.74
  6. Step 6: Final answer
    x = 542,504.89

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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.