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Finding the Fourth Proportional to 627,616.62, 866,082.87 and 355,668.66

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Solution

The fourth proportional to 627,616.62, 866,082.87 and 355,668.66 is: 490,806.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,616.62 : 866,082.87 = 355,668.66 : x
  2. Step 2: Convert to fraction form
    627,616.62/866,082.87 = 355,668.66/x
  3. Step 3: Cross multiply
    627,616.62x = 866,082.87 × 355,668.66
  4. Step 4: Simplify right side
    627,616.62x = 308,038,533,821.85
  5. Step 5: Solve for x
    x = 308,038,533,821.85/627,616.62
  6. Step 6: Final answer
    x = 490,806.85

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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.