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Finding the Fourth Proportional to 481,228.76, 663,943.02 and 279,985.88

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Solution

The fourth proportional to 481,228.76, 663,943.02 and 279,985.88 is: 386,291.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,228.76 : 663,943.02 = 279,985.88 : x
  2. Step 2: Convert to fraction form
    481,228.76/663,943.02 = 279,985.88/x
  3. Step 3: Cross multiply
    481,228.76x = 663,943.02 × 279,985.88
  4. Step 4: Simplify right side
    481,228.76x = 185,894,670,724.56
  5. Step 5: Solve for x
    x = 185,894,670,724.56/481,228.76
  6. Step 6: Final answer
    x = 386,291.69

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Double scale
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1.5x scale

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.