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Finding the Fourth Proportional to 647,091.30, 893,052.78 and 389,052.66

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Solution

The fourth proportional to 647,091.30, 893,052.78 and 389,052.66 is: 536,932.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,091.30 : 893,052.78 = 389,052.66 : x
  2. Step 2: Convert to fraction form
    647,091.30/893,052.78 = 389,052.66/x
  3. Step 3: Cross multiply
    647,091.30x = 893,052.78 × 389,052.66
  4. Step 4: Simplify right side
    647,091.30x = 347,444,559,579.40
  5. Step 5: Solve for x
    x = 347,444,559,579.40/647,091.30
  6. Step 6: Final answer
    x = 536,932.82

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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.