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Finding the Fourth Proportional to 439,896.80, 607,064.64 and 238,692.80

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Solution

The fourth proportional to 439,896.80, 607,064.64 and 238,692.80 is: 329,399.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,896.80 : 607,064.64 = 238,692.80 : x
  2. Step 2: Convert to fraction form
    439,896.80/607,064.64 = 238,692.80/x
  3. Step 3: Cross multiply
    439,896.80x = 607,064.64 × 238,692.80
  4. Step 4: Simplify right side
    439,896.80x = 144,901,958,702.59
  5. Step 5: Solve for x
    x = 144,901,958,702.59/439,896.80
  6. Step 6: Final answer
    x = 329,399.89

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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.