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Finding the Fourth Proportional to 421,286.88, 581,233.95 and 239,870.51

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Solution

The fourth proportional to 421,286.88, 581,233.95 and 239,870.51 is: 330,940.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,286.88 : 581,233.95 = 239,870.51 : x
  2. Step 2: Convert to fraction form
    421,286.88/581,233.95 = 239,870.51/x
  3. Step 3: Cross multiply
    421,286.88x = 581,233.95 × 239,870.51
  4. Step 4: Simplify right side
    421,286.88x = 139,420,881,109.65
  5. Step 5: Solve for x
    x = 139,420,881,109.65/421,286.88
  6. Step 6: Final answer
    x = 330,940.48

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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.