Home / 438,941.34-658,436.31-139,400.10

Finding the Fourth Proportional to 438,941.34, 658,436.31 and 139,400.10

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Solution

The fourth proportional to 438,941.34, 658,436.31 and 139,400.10 is: 209,107.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,941.34 : 658,436.31 = 139,400.10 : x
  2. Step 2: Convert to fraction form
    438,941.34/658,436.31 = 139,400.10/x
  3. Step 3: Cross multiply
    438,941.34x = 658,436.31 × 139,400.10
  4. Step 4: Simplify right side
    438,941.34x = 91,786,087,457.63
  5. Step 5: Solve for x
    x = 91,786,087,457.63/438,941.34
  6. Step 6: Final answer
    x = 209,107.87

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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.