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Finding the Fourth Proportional to 647,092.80, 893,054.85 and 389,054.16

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Solution

The fourth proportional to 647,092.80, 893,054.85 and 389,054.16 is: 536,934.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,092.80 : 893,054.85 = 389,054.16 : x
  2. Step 2: Convert to fraction form
    647,092.80/893,054.85 = 389,054.16/x
  3. Step 3: Cross multiply
    647,092.80x = 893,054.85 × 389,054.16
  4. Step 4: Simplify right side
    647,092.80x = 347,446,704,500.68
  5. Step 5: Solve for x
    x = 347,446,704,500.68/647,092.80
  6. Step 6: Final answer
    x = 536,934.89

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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.