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Finding the Fourth Proportional to 438,885.01, 658,350.29 and 139,389.03

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Solution

The fourth proportional to 438,885.01, 658,350.29 and 139,389.03 is: 209,090.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,885.01 : 658,350.29 = 139,389.03 : x
  2. Step 2: Convert to fraction form
    438,885.01/658,350.29 = 139,389.03/x
  3. Step 3: Cross multiply
    438,885.01x = 658,350.29 × 139,389.03
  4. Step 4: Simplify right side
    438,885.01x = 91,766,808,671.79
  5. Step 5: Solve for x
    x = 91,766,808,671.79/438,885.01
  6. Step 6: Final answer
    x = 209,090.78

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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.