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Finding the Fourth Proportional to 627,832.10, 866,437.91 and 355,905.28

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Solution

The fourth proportional to 627,832.10, 866,437.91 and 355,905.28 is: 491,166.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,832.10 : 866,437.91 = 355,905.28 : x
  2. Step 2: Convert to fraction form
    627,832.10/866,437.91 = 355,905.28/x
  3. Step 3: Cross multiply
    627,832.10x = 866,437.91 × 355,905.28
  4. Step 4: Simplify right side
    627,832.10x = 308,369,827,599.33
  5. Step 5: Solve for x
    x = 308,369,827,599.33/627,832.10
  6. Step 6: Final answer
    x = 491,166.07

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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.