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Finding the Fourth Proportional to 384,861.72, 531,107.84 and 215,095.85

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Solution

The fourth proportional to 384,861.72, 531,107.84 and 215,095.85 is: 296,831.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,861.72 : 531,107.84 = 215,095.85 : x
  2. Step 2: Convert to fraction form
    384,861.72/531,107.84 = 215,095.85/x
  3. Step 3: Cross multiply
    384,861.72x = 531,107.84 × 215,095.85
  4. Step 4: Simplify right side
    384,861.72x = 114,239,089,362.06
  5. Step 5: Solve for x
    x = 114,239,089,362.06/384,861.72
  6. Step 6: Final answer
    x = 296,831.52

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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.