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Finding the Fourth Proportional to 262,903.60, 394,452.60 and 85,416.40

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Solution

The fourth proportional to 262,903.60, 394,452.60 and 85,416.40 is: 128,156.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,903.60 : 394,452.60 = 85,416.40 : x
  2. Step 2: Convert to fraction form
    262,903.60/394,452.60 = 85,416.40/x
  3. Step 3: Cross multiply
    262,903.60x = 394,452.60 × 85,416.40
  4. Step 4: Simplify right side
    262,903.60x = 33,692,721,062.64
  5. Step 5: Solve for x
    x = 33,692,721,062.64/262,903.60
  6. Step 6: Final answer
    x = 128,156.18

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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.