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Finding the Fourth Proportional to 348,868.60, 523,302.90 and 86,212.60

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Solution

The fourth proportional to 348,868.60, 523,302.90 and 86,212.60 is: 129,318.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,868.60 : 523,302.90 = 86,212.60 : x
  2. Step 2: Convert to fraction form
    348,868.60/523,302.90 = 86,212.60/x
  3. Step 3: Cross multiply
    348,868.60x = 523,302.90 × 86,212.60
  4. Step 4: Simplify right side
    348,868.60x = 45,115,303,596.54
  5. Step 5: Solve for x
    x = 45,115,303,596.54/348,868.60
  6. Step 6: Final answer
    x = 129,318.90

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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.