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Finding the Fourth Proportional to 318,918.40, 478,766.40 and 161,065.60

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Solution

The fourth proportional to 318,918.40, 478,766.40 and 161,065.60 is: 241,794.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,918.40 : 478,766.40 = 161,065.60 : x
  2. Step 2: Convert to fraction form
    318,918.40/478,766.40 = 161,065.60/x
  3. Step 3: Cross multiply
    318,918.40x = 478,766.40 × 161,065.60
  4. Step 4: Simplify right side
    318,918.40x = 77,112,797,475.84
  5. Step 5: Solve for x
    x = 77,112,797,475.84/318,918.40
  6. Step 6: Final answer
    x = 241,794.76

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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.