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Finding the Fourth Proportional to 281,387.13, 388,314.39 and 154,062.77

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Solution

The fourth proportional to 281,387.13, 388,314.39 and 154,062.77 is: 212,606.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,387.13 : 388,314.39 = 154,062.77 : x
  2. Step 2: Convert to fraction form
    281,387.13/388,314.39 = 154,062.77/x
  3. Step 3: Cross multiply
    281,387.13x = 388,314.39 × 154,062.77
  4. Step 4: Simplify right side
    281,387.13x = 59,824,788,612.69
  5. Step 5: Solve for x
    x = 59,824,788,612.69/281,387.13
  6. Step 6: Final answer
    x = 212,606.70

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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.