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Finding the Fourth Proportional to 385,438.94, 531,906.44 and 213,368.88

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Solution

The fourth proportional to 385,438.94, 531,906.44 and 213,368.88 is: 294,449.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,438.94 : 531,906.44 = 213,368.88 : x
  2. Step 2: Convert to fraction form
    385,438.94/531,906.44 = 213,368.88/x
  3. Step 3: Cross multiply
    385,438.94x = 531,906.44 × 213,368.88
  4. Step 4: Simplify right side
    385,438.94x = 113,492,281,367.59
  5. Step 5: Solve for x
    x = 113,492,281,367.59/385,438.94
  6. Step 6: Final answer
    x = 294,449.44

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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.