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Finding the Fourth Proportional to 421,394.30, 581,486.94 and 240,099.32

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Solution

The fourth proportional to 421,394.30, 581,486.94 and 240,099.32 is: 331,315.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,394.30 : 581,486.94 = 240,099.32 : x
  2. Step 2: Convert to fraction form
    421,394.30/581,486.94 = 240,099.32/x
  3. Step 3: Cross multiply
    421,394.30x = 581,486.94 × 240,099.32
  4. Step 4: Simplify right side
    421,394.30x = 139,614,618,882.88
  5. Step 5: Solve for x
    x = 139,614,618,882.88/421,394.30
  6. Step 6: Final answer
    x = 331,315.87

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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.