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Finding the Fourth Proportional to 647,692.80, 893,456.64 and 379,368.96

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Solution

The fourth proportional to 647,692.80, 893,456.64 and 379,368.96 is: 523,318.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,692.80 : 893,456.64 = 379,368.96 : x
  2. Step 2: Convert to fraction form
    647,692.80/893,456.64 = 379,368.96/x
  3. Step 3: Cross multiply
    647,692.80x = 893,456.64 × 379,368.96
  4. Step 4: Simplify right side
    647,692.80x = 338,949,716,321.89
  5. Step 5: Solve for x
    x = 338,949,716,321.89/647,692.80
  6. Step 6: Final answer
    x = 523,318.64

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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.