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Finding the Fourth Proportional to 480,408.96, 663,005.28 and 279,192

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Solution

The fourth proportional to 480,408.96, 663,005.28 and 279,192 is: 385,308.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,408.96 : 663,005.28 = 279,192 : x
  2. Step 2: Convert to fraction form
    480,408.96/663,005.28 = 279,192/x
  3. Step 3: Cross multiply
    480,408.96x = 663,005.28 × 279,192
  4. Step 4: Simplify right side
    480,408.96x = 185,105,770,133.76
  5. Step 5: Solve for x
    x = 185,105,770,133.76/480,408.96
  6. Step 6: Final answer
    x = 385,308.74

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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.