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Finding the Fourth Proportional to 263,289.60, 394,837.20 and 85,802.40

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Solution

The fourth proportional to 263,289.60, 394,837.20 and 85,802.40 is: 128,671.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,289.60 : 394,837.20 = 85,802.40 : x
  2. Step 2: Convert to fraction form
    263,289.60/394,837.20 = 85,802.40/x
  3. Step 3: Cross multiply
    263,289.60x = 394,837.20 × 85,802.40
  4. Step 4: Simplify right side
    263,289.60x = 33,877,979,369.28
  5. Step 5: Solve for x
    x = 33,877,979,369.28/263,289.60
  6. Step 6: Final answer
    x = 128,671.92

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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.