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Finding the Fourth Proportional to 316,855.20, 474,505.20 and 211,101.60

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Solution

The fourth proportional to 316,855.20, 474,505.20 and 211,101.60 is: 316,134.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,855.20 : 474,505.20 = 211,101.60 : x
  2. Step 2: Convert to fraction form
    316,855.20/474,505.20 = 211,101.60/x
  3. Step 3: Cross multiply
    316,855.20x = 474,505.20 × 211,101.60
  4. Step 4: Simplify right side
    316,855.20x = 100,168,806,928.32
  5. Step 5: Solve for x
    x = 100,168,806,928.32/316,855.20
  6. Step 6: Final answer
    x = 316,134.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.