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Finding the Fourth Proportional to 438,897.54, 658,369.10 and 139,401.55

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Solution

The fourth proportional to 438,897.54, 658,369.10 and 139,401.55 is: 209,109.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,897.54 : 658,369.10 = 139,401.55 : x
  2. Step 2: Convert to fraction form
    438,897.54/658,369.10 = 139,401.55/x
  3. Step 3: Cross multiply
    438,897.54x = 658,369.10 × 139,401.55
  4. Step 4: Simplify right side
    438,897.54x = 91,777,673,012.11
  5. Step 5: Solve for x
    x = 91,777,673,012.11/438,897.54
  6. Step 6: Final answer
    x = 209,109.56

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1.5x scale

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.