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Finding the Fourth Proportional to 667,382.90, 921,069.30 and 377,006.70

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Solution

The fourth proportional to 667,382.90, 921,069.30 and 377,006.70 is: 520,314.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,382.90 : 921,069.30 = 377,006.70 : x
  2. Step 2: Convert to fraction form
    667,382.90/921,069.30 = 377,006.70/x
  3. Step 3: Cross multiply
    667,382.90x = 921,069.30 × 377,006.70
  4. Step 4: Simplify right side
    667,382.90x = 347,249,297,264.31
  5. Step 5: Solve for x
    x = 347,249,297,264.31/667,382.90
  6. Step 6: Final answer
    x = 520,314.95

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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.