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Finding the Fourth Proportional to 281,387.68, 388,314.93 and 154,063.24

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Solution

The fourth proportional to 281,387.68, 388,314.93 and 154,063.24 is: 212,607.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,387.68 : 388,314.93 = 154,063.24 : x
  2. Step 2: Convert to fraction form
    281,387.68/388,314.93 = 154,063.24/x
  3. Step 3: Cross multiply
    281,387.68x = 388,314.93 × 154,063.24
  4. Step 4: Simplify right side
    281,387.68x = 59,825,056,256.17
  5. Step 5: Solve for x
    x = 59,825,056,256.17/281,387.68
  6. Step 6: Final answer
    x = 212,607.23

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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.