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Finding the Fourth Proportional to 262,701.75, 394,015.70 and 85,210.31

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Solution

The fourth proportional to 262,701.75, 394,015.70 and 85,210.31 is: 127,803.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,701.75 : 394,015.70 = 85,210.31 : x
  2. Step 2: Convert to fraction form
    262,701.75/394,015.70 = 85,210.31/x
  3. Step 3: Cross multiply
    262,701.75x = 394,015.70 × 85,210.31
  4. Step 4: Simplify right side
    262,701.75x = 33,574,197,545.74
  5. Step 5: Solve for x
    x = 33,574,197,545.74/262,701.75
  6. Step 6: Final answer
    x = 127,803.48

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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.