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Finding the Fourth Proportional to 262,804.60, 394,304.10 and 85,317.40

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Solution

The fourth proportional to 262,804.60, 394,304.10 and 85,317.40 is: 128,007.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,804.60 : 394,304.10 = 85,317.40 : x
  2. Step 2: Convert to fraction form
    262,804.60/394,304.10 = 85,317.40/x
  3. Step 3: Cross multiply
    262,804.60x = 394,304.10 × 85,317.40
  4. Step 4: Simplify right side
    262,804.60x = 33,641,000,621.34
  5. Step 5: Solve for x
    x = 33,641,000,621.34/262,804.60
  6. Step 6: Final answer
    x = 128,007.66

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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.