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Finding the Fourth Proportional to 417,692.40, 626,538.60 and 137,218.80

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Solution

The fourth proportional to 417,692.40, 626,538.60 and 137,218.80 is: 205,828.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,692.40 : 626,538.60 = 137,218.80 : x
  2. Step 2: Convert to fraction form
    417,692.40/626,538.60 = 137,218.80/x
  3. Step 3: Cross multiply
    417,692.40x = 626,538.60 × 137,218.80
  4. Step 4: Simplify right side
    417,692.40x = 85,972,874,845.68
  5. Step 5: Solve for x
    x = 85,972,874,845.68/417,692.40
  6. Step 6: Final answer
    x = 205,828.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.