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Finding the Fourth Proportional to 493,679.82, 740,545.08 and 138,721.50

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Solution

The fourth proportional to 493,679.82, 740,545.08 and 138,721.50 is: 208,089.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,679.82 : 740,545.08 = 138,721.50 : x
  2. Step 2: Convert to fraction form
    493,679.82/740,545.08 = 138,721.50/x
  3. Step 3: Cross multiply
    493,679.82x = 740,545.08 × 138,721.50
  4. Step 4: Simplify right side
    493,679.82x = 102,729,524,315.22
  5. Step 5: Solve for x
    x = 102,729,524,315.22/493,679.82
  6. Step 6: Final answer
    x = 208,089.37

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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.