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Finding the Fourth Proportional to 421,287.82, 581,235.24 and 239,871.44

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Solution

The fourth proportional to 421,287.82, 581,235.24 and 239,871.44 is: 330,941.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,287.82 : 581,235.24 = 239,871.44 : x
  2. Step 2: Convert to fraction form
    421,287.82/581,235.24 = 239,871.44/x
  3. Step 3: Cross multiply
    421,287.82x = 581,235.24 × 239,871.44
  4. Step 4: Simplify right side
    421,287.82x = 139,421,736,350.15
  5. Step 5: Solve for x
    x = 139,421,736,350.15/421,287.82
  6. Step 6: Final answer
    x = 330,941.77

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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.