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Finding the Fourth Proportional to 287,243.84, 431,062.62 and 100,255.34

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Solution

The fourth proportional to 287,243.84, 431,062.62 and 100,255.34 is: 150,451.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,243.84 : 431,062.62 = 100,255.34 : x
  2. Step 2: Convert to fraction form
    287,243.84/431,062.62 = 100,255.34/x
  3. Step 3: Cross multiply
    287,243.84x = 431,062.62 × 100,255.34
  4. Step 4: Simplify right side
    287,243.84x = 43,216,329,529.39
  5. Step 5: Solve for x
    x = 43,216,329,529.39/287,243.84
  6. Step 6: Final answer
    x = 150,451.72

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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.