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Finding the Fourth Proportional to 289,792.08, 399,939.12 and 168,972.48

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Solution

The fourth proportional to 289,792.08, 399,939.12 and 168,972.48 is: 233,197.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,792.08 : 399,939.12 = 168,972.48 : x
  2. Step 2: Convert to fraction form
    289,792.08/399,939.12 = 168,972.48/x
  3. Step 3: Cross multiply
    289,792.08x = 399,939.12 × 168,972.48
  4. Step 4: Simplify right side
    289,792.08x = 67,578,704,955.42
  5. Step 5: Solve for x
    x = 67,578,704,955.42/289,792.08
  6. Step 6: Final answer
    x = 233,197.21

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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.