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Finding the Fourth Proportional to 287,562.44, 431,049.90 and 100,420.04

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Solution

The fourth proportional to 287,562.44, 431,049.90 and 100,420.04 is: 150,527.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,562.44 : 431,049.90 = 100,420.04 : x
  2. Step 2: Convert to fraction form
    287,562.44/431,049.90 = 100,420.04/x
  3. Step 3: Cross multiply
    287,562.44x = 431,049.90 × 100,420.04
  4. Step 4: Simplify right side
    287,562.44x = 43,286,048,200.00
  5. Step 5: Solve for x
    x = 43,286,048,200.00/287,562.44
  6. Step 6: Final answer
    x = 150,527.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.