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Finding the Fourth Proportional to 281,381.15, 388,305.96 and 154,056.71

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Solution

The fourth proportional to 281,381.15, 388,305.96 and 154,056.71 is: 212,598.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,381.15 : 388,305.96 = 154,056.71 : x
  2. Step 2: Convert to fraction form
    281,381.15/388,305.96 = 154,056.71/x
  3. Step 3: Cross multiply
    281,381.15x = 388,305.96 × 154,056.71
  4. Step 4: Simplify right side
    281,381.15x = 59,821,138,670.99
  5. Step 5: Solve for x
    x = 59,821,138,670.99/281,381.15
  6. Step 6: Final answer
    x = 212,598.25

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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.