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Finding the Fourth Proportional to 493,615.62, 740,365.52 and 138,659.85

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Solution

The fourth proportional to 493,615.62, 740,365.52 and 138,659.85 is: 207,973.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,615.62 : 740,365.52 = 138,659.85 : x
  2. Step 2: Convert to fraction form
    493,615.62/740,365.52 = 138,659.85/x
  3. Step 3: Cross multiply
    493,615.62x = 740,365.52 × 138,659.85
  4. Step 4: Simplify right side
    493,615.62x = 102,658,971,255.07
  5. Step 5: Solve for x
    x = 102,658,971,255.07/493,615.62
  6. Step 6: Final answer
    x = 207,973.51

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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.