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Finding the Fourth Proportional to 281,375.64, 388,298.21 and 154,051.20

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Solution

The fourth proportional to 281,375.64, 388,298.21 and 154,051.20 is: 212,590.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,375.64 : 388,298.21 = 154,051.20 : x
  2. Step 2: Convert to fraction form
    281,375.64/388,298.21 = 154,051.20/x
  3. Step 3: Cross multiply
    281,375.64x = 388,298.21 × 154,051.20
  4. Step 4: Simplify right side
    281,375.64x = 59,817,804,438.10
  5. Step 5: Solve for x
    x = 59,817,804,438.10/281,375.64
  6. Step 6: Final answer
    x = 212,590.56

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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.