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Finding the Fourth Proportional to 620,466.94, 856,336.94 and 378,889.55

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Solution

The fourth proportional to 620,466.94, 856,336.94 and 378,889.55 is: 522,924.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,466.94 : 856,336.94 = 378,889.55 : x
  2. Step 2: Convert to fraction form
    620,466.94/856,336.94 = 378,889.55/x
  3. Step 3: Cross multiply
    620,466.94x = 856,336.94 × 378,889.55
  4. Step 4: Simplify right side
    620,466.94x = 324,457,115,235.32
  5. Step 5: Solve for x
    x = 324,457,115,235.32/620,466.94
  6. Step 6: Final answer
    x = 522,924.10

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Double scale
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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.