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Finding the Fourth Proportional to 620,246.32, 856,032.48 and 378,668.96

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Solution

The fourth proportional to 620,246.32, 856,032.48 and 378,668.96 is: 522,619.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,246.32 : 856,032.48 = 378,668.96 : x
  2. Step 2: Convert to fraction form
    620,246.32/856,032.48 = 378,668.96/x
  3. Step 3: Cross multiply
    620,246.32x = 856,032.48 × 378,668.96
  4. Step 4: Simplify right side
    620,246.32x = 324,152,928,927.82
  5. Step 5: Solve for x
    x = 324,152,928,927.82/620,246.32
  6. Step 6: Final answer
    x = 522,619.67

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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.