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Finding the Fourth Proportional to 627,642.84, 866,143.62 and 355,762.14

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Solution

The fourth proportional to 627,642.84, 866,143.62 and 355,762.14 is: 490,949.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,642.84 : 866,143.62 = 355,762.14 : x
  2. Step 2: Convert to fraction form
    627,642.84/866,143.62 = 355,762.14/x
  3. Step 3: Cross multiply
    627,642.84x = 866,143.62 × 355,762.14
  4. Step 4: Simplify right side
    627,642.84x = 308,141,107,798.55
  5. Step 5: Solve for x
    x = 308,141,107,798.55/627,642.84
  6. Step 6: Final answer
    x = 490,949.77

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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.