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Finding the Fourth Proportional to 279,688.78, 385,967 and 152,361.64

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Solution

The fourth proportional to 279,688.78, 385,967 and 152,361.64 is: 210,257.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,688.78 : 385,967 = 152,361.64 : x
  2. Step 2: Convert to fraction form
    279,688.78/385,967 = 152,361.64/x
  3. Step 3: Cross multiply
    279,688.78x = 385,967 × 152,361.64
  4. Step 4: Simplify right side
    279,688.78x = 58,806,565,105.88
  5. Step 5: Solve for x
    x = 58,806,565,105.88/279,688.78
  6. Step 6: Final answer
    x = 210,257.15

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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.