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Finding the Fourth Proportional to 287,424.60, 431,201.70 and 87,754.20

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Solution

The fourth proportional to 287,424.60, 431,201.70 and 87,754.20 is: 131,651.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,424.60 : 431,201.70 = 87,754.20 : x
  2. Step 2: Convert to fraction form
    287,424.60/431,201.70 = 87,754.20/x
  3. Step 3: Cross multiply
    287,424.60x = 431,201.70 × 87,754.20
  4. Step 4: Simplify right side
    287,424.60x = 37,839,760,222.14
  5. Step 5: Solve for x
    x = 37,839,760,222.14/287,424.60
  6. Step 6: Final answer
    x = 131,651.08

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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.