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Finding the Fourth Proportional to 445,892.10, 668,838.15 and 256,935.30

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Solution

The fourth proportional to 445,892.10, 668,838.15 and 256,935.30 is: 385,402.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,892.10 : 668,838.15 = 256,935.30 : x
  2. Step 2: Convert to fraction form
    445,892.10/668,838.15 = 256,935.30/x
  3. Step 3: Cross multiply
    445,892.10x = 668,838.15 × 256,935.30
  4. Step 4: Simplify right side
    445,892.10x = 171,848,130,721.70
  5. Step 5: Solve for x
    x = 171,848,130,721.70/445,892.10
  6. Step 6: Final answer
    x = 385,402.95

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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.