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Finding the Fourth Proportional to 439,074.32, 658,708.68 and 139,646.48

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Solution

The fourth proportional to 439,074.32, 658,708.68 and 139,646.48 is: 209,500.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,074.32 : 658,708.68 = 139,646.48 : x
  2. Step 2: Convert to fraction form
    439,074.32/658,708.68 = 139,646.48/x
  3. Step 3: Cross multiply
    439,074.32x = 658,708.68 × 139,646.48
  4. Step 4: Simplify right side
    439,074.32x = 91,986,348,507.45
  5. Step 5: Solve for x
    x = 91,986,348,507.45/439,074.32
  6. Step 6: Final answer
    x = 209,500.63

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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.