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Finding the Fourth Proportional to 426,366, 639,503.64 and 226,474.20

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Solution

The fourth proportional to 426,366, 639,503.64 and 226,474.20 is: 339,687.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,366 : 639,503.64 = 226,474.20 : x
  2. Step 2: Convert to fraction form
    426,366/639,503.64 = 226,474.20/x
  3. Step 3: Cross multiply
    426,366x = 639,503.64 × 226,474.20
  4. Step 4: Simplify right side
    426,366x = 144,831,075,266.09
  5. Step 5: Solve for x
    x = 144,831,075,266.09/426,366
  6. Step 6: Final answer
    x = 339,687.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.