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Finding the Fourth Proportional to 279,163.25, 385,285.23 and 156,668.70

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Solution

The fourth proportional to 279,163.25, 385,285.23 and 156,668.70 is: 216,225.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,163.25 : 385,285.23 = 156,668.70 : x
  2. Step 2: Convert to fraction form
    279,163.25/385,285.23 = 156,668.70/x
  3. Step 3: Cross multiply
    279,163.25x = 385,285.23 × 156,668.70
  4. Step 4: Simplify right side
    279,163.25x = 60,362,135,329.96
  5. Step 5: Solve for x
    x = 60,362,135,329.96/279,163.25
  6. Step 6: Final answer
    x = 216,225.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.