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Finding the Fourth Proportional to 211,636.40, 317,454.60 and 203,471.60

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Solution

The fourth proportional to 211,636.40, 317,454.60 and 203,471.60 is: 305,207.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,636.40 : 317,454.60 = 203,471.60 : x
  2. Step 2: Convert to fraction form
    211,636.40/317,454.60 = 203,471.60/x
  3. Step 3: Cross multiply
    211,636.40x = 317,454.60 × 203,471.60
  4. Step 4: Simplify right side
    211,636.40x = 64,592,995,389.36
  5. Step 5: Solve for x
    x = 64,592,995,389.36/211,636.40
  6. Step 6: Final answer
    x = 305,207.40

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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.