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Finding the Fourth Proportional to 281,354.06, 388,268.70 and 154,037.72

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Solution

The fourth proportional to 281,354.06, 388,268.70 and 154,037.72 is: 212,572.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,354.06 : 388,268.70 = 154,037.72 : x
  2. Step 2: Convert to fraction form
    281,354.06/388,268.70 = 154,037.72/x
  3. Step 3: Cross multiply
    281,354.06x = 388,268.70 × 154,037.72
  4. Step 4: Simplify right side
    281,354.06x = 59,808,025,295.36
  5. Step 5: Solve for x
    x = 59,808,025,295.36/281,354.06
  6. Step 6: Final answer
    x = 212,572.11

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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.