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Finding the Fourth Proportional to 421,391.21, 581,576.84 and 237,667.53

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Solution

The fourth proportional to 421,391.21, 581,576.84 and 237,667.53 is: 328,013.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,391.21 : 581,576.84 = 237,667.53 : x
  2. Step 2: Convert to fraction form
    421,391.21/581,576.84 = 237,667.53/x
  3. Step 3: Cross multiply
    421,391.21x = 581,576.84 × 237,667.53
  4. Step 4: Simplify right side
    421,391.21x = 138,221,934,288.71
  5. Step 5: Solve for x
    x = 138,221,934,288.71/421,391.21
  6. Step 6: Final answer
    x = 328,013.33

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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.