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Finding the Fourth Proportional to 438,652.67, 658,002.39 and 139,157.19

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Solution

The fourth proportional to 438,652.67, 658,002.39 and 139,157.19 is: 208,743.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,652.67 : 658,002.39 = 139,157.19 : x
  2. Step 2: Convert to fraction form
    438,652.67/658,002.39 = 139,157.19/x
  3. Step 3: Cross multiply
    438,652.67x = 658,002.39 × 139,157.19
  4. Step 4: Simplify right side
    438,652.67x = 91,565,763,083.84
  5. Step 5: Solve for x
    x = 91,565,763,083.84/438,652.67
  6. Step 6: Final answer
    x = 208,743.20

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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.