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Finding the Fourth Proportional to 647,093.30, 893,055.54 and 389,054.66

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Solution

The fourth proportional to 647,093.30, 893,055.54 and 389,054.66 is: 536,935.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,093.30 : 893,055.54 = 389,054.66 : x
  2. Step 2: Convert to fraction form
    647,093.30/893,055.54 = 389,054.66/x
  3. Step 3: Cross multiply
    647,093.30x = 893,055.54 × 389,054.66
  4. Step 4: Simplify right side
    647,093.30x = 347,447,419,475.82
  5. Step 5: Solve for x
    x = 347,447,419,475.82/647,093.30
  6. Step 6: Final answer
    x = 536,935.58

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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.