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Finding the Fourth Proportional to 627,988.60, 866,643.76 and 356,067.96

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Solution

The fourth proportional to 627,988.60, 866,643.76 and 356,067.96 is: 491,384.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,988.60 : 866,643.76 = 356,067.96 : x
  2. Step 2: Convert to fraction form
    627,988.60/866,643.76 = 356,067.96/x
  3. Step 3: Cross multiply
    627,988.60x = 866,643.76 × 356,067.96
  4. Step 4: Simplify right side
    627,988.60x = 308,584,075,669.93
  5. Step 5: Solve for x
    x = 308,584,075,669.93/627,988.60
  6. Step 6: Final answer
    x = 491,384.84

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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.