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Finding the Fourth Proportional to 427,692.83, 640,830.84 and 300,712.69

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Solution

The fourth proportional to 427,692.83, 640,830.84 and 300,712.69 is: 450,570.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,692.83 : 640,830.84 = 300,712.69 : x
  2. Step 2: Convert to fraction form
    427,692.83/640,830.84 = 300,712.69/x
  3. Step 3: Cross multiply
    427,692.83x = 640,830.84 × 300,712.69
  4. Step 4: Simplify right side
    427,692.83x = 192,705,965,731.36
  5. Step 5: Solve for x
    x = 192,705,965,731.36/427,692.83
  6. Step 6: Final answer
    x = 450,570.95

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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.