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Finding the Fourth Proportional to 281,513.88, 388,485.72 and 154,189.44

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Solution

The fourth proportional to 281,513.88, 388,485.72 and 154,189.44 is: 212,779.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,513.88 : 388,485.72 = 154,189.44 : x
  2. Step 2: Convert to fraction form
    281,513.88/388,485.72 = 154,189.44/x
  3. Step 3: Cross multiply
    281,513.88x = 388,485.72 × 154,189.44
  4. Step 4: Simplify right side
    281,513.88x = 59,900,395,614.80
  5. Step 5: Solve for x
    x = 59,900,395,614.80/281,513.88
  6. Step 6: Final answer
    x = 212,779.55

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1.5x scale

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.