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Finding the Fourth Proportional to 439,019.52, 658,460.32 and 139,460.64

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Solution

The fourth proportional to 439,019.52, 658,460.32 and 139,460.64 is: 209,169.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,019.52 : 658,460.32 = 139,460.64 : x
  2. Step 2: Convert to fraction form
    439,019.52/658,460.32 = 139,460.64/x
  3. Step 3: Cross multiply
    439,019.52x = 658,460.32 × 139,460.64
  4. Step 4: Simplify right side
    439,019.52x = 91,829,297,641.80
  5. Step 5: Solve for x
    x = 91,829,297,641.80/439,019.52
  6. Step 6: Final answer
    x = 209,169.05

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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.