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Finding the Fourth Proportional to 371,647.79, 512,785.72 and 218,692.65

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Solution

The fourth proportional to 371,647.79, 512,785.72 and 218,692.65 is: 301,743.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,647.79 : 512,785.72 = 218,692.65 : x
  2. Step 2: Convert to fraction form
    371,647.79/512,785.72 = 218,692.65/x
  3. Step 3: Cross multiply
    371,647.79x = 512,785.72 × 218,692.65
  4. Step 4: Simplify right side
    371,647.79x = 112,142,467,988.96
  5. Step 5: Solve for x
    x = 112,142,467,988.96/371,647.79
  6. Step 6: Final answer
    x = 301,743.94

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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.