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Finding the Fourth Proportional to 421,571.28, 581,753.64 and 240,341.58

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Solution

The fourth proportional to 421,571.28, 581,753.64 and 240,341.58 is: 331,662.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,571.28 : 581,753.64 = 240,341.58 : x
  2. Step 2: Convert to fraction form
    421,571.28/581,753.64 = 240,341.58/x
  3. Step 3: Cross multiply
    421,571.28x = 581,753.64 × 240,341.58
  4. Step 4: Simplify right side
    421,571.28x = 139,819,589,909.63
  5. Step 5: Solve for x
    x = 139,819,589,909.63/421,571.28
  6. Step 6: Final answer
    x = 331,662.98

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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.