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Finding the Fourth Proportional to 211,518.56, 317,307 and 71,317.28

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Solution

The fourth proportional to 211,518.56, 317,307 and 71,317.28 is: 106,985.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,518.56 : 317,307 = 71,317.28 : x
  2. Step 2: Convert to fraction form
    211,518.56/317,307 = 71,317.28/x
  3. Step 3: Cross multiply
    211,518.56x = 317,307 × 71,317.28
  4. Step 4: Simplify right side
    211,518.56x = 22,629,472,164.96
  5. Step 5: Solve for x
    x = 22,629,472,164.96/211,518.56
  6. Step 6: Final answer
    x = 106,985.75

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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.