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Finding the Fourth Proportional to 287,244.94, 431,064.27 and 100,256.44

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Solution

The fourth proportional to 287,244.94, 431,064.27 and 100,256.44 is: 150,453.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,244.94 : 431,064.27 = 100,256.44 : x
  2. Step 2: Convert to fraction form
    287,244.94/431,064.27 = 100,256.44/x
  3. Step 3: Cross multiply
    287,244.94x = 431,064.27 × 100,256.44
  4. Step 4: Simplify right side
    287,244.94x = 43,216,969,121.40
  5. Step 5: Solve for x
    x = 43,216,969,121.40/287,244.94
  6. Step 6: Final answer
    x = 150,453.37

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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.