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Finding the Fourth Proportional to 438,655.77, 658,007.06 and 139,160.30

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Solution

The fourth proportional to 438,655.77, 658,007.06 and 139,160.30 is: 208,747.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,655.77 : 658,007.06 = 139,160.30 : x
  2. Step 2: Convert to fraction form
    438,655.77/658,007.06 = 139,160.30/x
  3. Step 3: Cross multiply
    438,655.77x = 658,007.06 × 139,160.30
  4. Step 4: Simplify right side
    438,655.77x = 91,568,455,885.88
  5. Step 5: Solve for x
    x = 91,568,455,885.88/438,655.77
  6. Step 6: Final answer
    x = 208,747.87

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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.