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Finding the Fourth Proportional to 439,890.80, 607,056.36 and 238,686.80

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Solution

The fourth proportional to 439,890.80, 607,056.36 and 238,686.80 is: 329,391.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,890.80 : 607,056.36 = 238,686.80 : x
  2. Step 2: Convert to fraction form
    439,890.80/607,056.36 = 238,686.80/x
  3. Step 3: Cross multiply
    439,890.80x = 607,056.36 × 238,686.80
  4. Step 4: Simplify right side
    439,890.80x = 144,896,339,988.05
  5. Step 5: Solve for x
    x = 144,896,339,988.05/439,890.80
  6. Step 6: Final answer
    x = 329,391.61

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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.