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Finding the Fourth Proportional to 281,428.59, 388,357.02 and 154,079.58

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Solution

The fourth proportional to 281,428.59, 388,357.02 and 154,079.58 is: 212,621.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,428.59 : 388,357.02 = 154,079.58 : x
  2. Step 2: Convert to fraction form
    281,428.59/388,357.02 = 154,079.58/x
  3. Step 3: Cross multiply
    281,428.59x = 388,357.02 × 154,079.58
  4. Step 4: Simplify right side
    281,428.59x = 59,837,886,531.65
  5. Step 5: Solve for x
    x = 59,837,886,531.65/281,428.59
  6. Step 6: Final answer
    x = 212,621.92

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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.