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Finding the Fourth Proportional to 287,235.59, 431,050.19 and 100,247.09

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Solution

The fourth proportional to 287,235.59, 431,050.19 and 100,247.09 is: 150,439.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,235.59 : 431,050.19 = 100,247.09 : x
  2. Step 2: Convert to fraction form
    287,235.59/431,050.19 = 100,247.09/x
  3. Step 3: Cross multiply
    287,235.59x = 431,050.19 × 100,247.09
  4. Step 4: Simplify right side
    287,235.59x = 43,211,524,534.96
  5. Step 5: Solve for x
    x = 43,211,524,534.96/287,235.59
  6. Step 6: Final answer
    x = 150,439.31

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1.5x scale

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.