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Finding the Fourth Proportional to 421,463.88, 581,614.56 and 240,186.60

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Solution

The fourth proportional to 421,463.88, 581,614.56 and 240,186.60 is: 331,454.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,463.88 : 581,614.56 = 240,186.60 : x
  2. Step 2: Convert to fraction form
    421,463.88/581,614.56 = 240,186.60/x
  3. Step 3: Cross multiply
    421,463.88x = 581,614.56 × 240,186.60
  4. Step 4: Simplify right side
    421,463.88x = 139,696,023,676.90
  5. Step 5: Solve for x
    x = 139,696,023,676.90/421,463.88
  6. Step 6: Final answer
    x = 331,454.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.