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Finding the Fourth Proportional to 262,990.79, 394,236.50 and 85,373.58

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Solution

The fourth proportional to 262,990.79, 394,236.50 and 85,373.58 is: 127,979.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,990.79 : 394,236.50 = 85,373.58 : x
  2. Step 2: Convert to fraction form
    262,990.79/394,236.50 = 85,373.58/x
  3. Step 3: Cross multiply
    262,990.79x = 394,236.50 × 85,373.58
  4. Step 4: Simplify right side
    262,990.79x = 33,657,381,371.67
  5. Step 5: Solve for x
    x = 33,657,381,371.67/262,990.79
  6. Step 6: Final answer
    x = 127,979.32

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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.