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Finding the Fourth Proportional to 289,381.32, 399,324.06 and 162,039.60

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Solution

The fourth proportional to 289,381.32, 399,324.06 and 162,039.60 is: 223,602.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,381.32 : 399,324.06 = 162,039.60 : x
  2. Step 2: Convert to fraction form
    289,381.32/399,324.06 = 162,039.60/x
  3. Step 3: Cross multiply
    289,381.32x = 399,324.06 × 162,039.60
  4. Step 4: Simplify right side
    289,381.32x = 64,706,310,952.78
  5. Step 5: Solve for x
    x = 64,706,310,952.78/289,381.32
  6. Step 6: Final answer
    x = 223,602.24

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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.