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Finding the Fourth Proportional to 262,816.60, 394,127.70 and 85,329.40

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Solution

The fourth proportional to 262,816.60, 394,127.70 and 85,329.40 is: 127,962.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,816.60 : 394,127.70 = 85,329.40 : x
  2. Step 2: Convert to fraction form
    262,816.60/394,127.70 = 85,329.40/x
  3. Step 3: Cross multiply
    262,816.60x = 394,127.70 × 85,329.40
  4. Step 4: Simplify right side
    262,816.60x = 33,630,680,164.38
  5. Step 5: Solve for x
    x = 33,630,680,164.38/262,816.60
  6. Step 6: Final answer
    x = 127,962.54

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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.