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Finding the Fourth Proportional to 211,894.20, 318,359.70 and 159,406.20

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Solution

The fourth proportional to 211,894.20, 318,359.70 and 159,406.20 is: 239,499.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,894.20 : 318,359.70 = 159,406.20 : x
  2. Step 2: Convert to fraction form
    211,894.20/318,359.70 = 159,406.20/x
  3. Step 3: Cross multiply
    211,894.20x = 318,359.70 × 159,406.20
  4. Step 4: Simplify right side
    211,894.20x = 50,748,510,010.14
  5. Step 5: Solve for x
    x = 50,748,510,010.14/211,894.20
  6. Step 6: Final answer
    x = 239,499.29

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1.5x scale

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.