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Finding the Fourth Proportional to 493,717.38, 740,603.70 and 138,703.70

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Solution

The fourth proportional to 493,717.38, 740,603.70 and 138,703.70 is: 208,063.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,717.38 : 740,603.70 = 138,703.70 : x
  2. Step 2: Convert to fraction form
    493,717.38/740,603.70 = 138,703.70/x
  3. Step 3: Cross multiply
    493,717.38x = 740,603.70 × 138,703.70
  4. Step 4: Simplify right side
    493,717.38x = 102,724,469,720.67
  5. Step 5: Solve for x
    x = 102,724,469,720.67/493,717.38
  6. Step 6: Final answer
    x = 208,063.30

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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.