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Finding the Fourth Proportional to 262,877.60, 394,219.20 and 85,390.40

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Solution

The fourth proportional to 262,877.60, 394,219.20 and 85,390.40 is: 128,054.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,877.60 : 394,219.20 = 85,390.40 : x
  2. Step 2: Convert to fraction form
    262,877.60/394,219.20 = 85,390.40/x
  3. Step 3: Cross multiply
    262,877.60x = 394,219.20 × 85,390.40
  4. Step 4: Simplify right side
    262,877.60x = 33,662,535,175.68
  5. Step 5: Solve for x
    x = 33,662,535,175.68/262,877.60
  6. Step 6: Final answer
    x = 128,054.03

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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.