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Finding the Fourth Proportional to 661,175.20, 991,762.80 and 211,895.20

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Solution

The fourth proportional to 661,175.20, 991,762.80 and 211,895.20 is: 317,842.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,175.20 : 991,762.80 = 211,895.20 : x
  2. Step 2: Convert to fraction form
    661,175.20/991,762.80 = 211,895.20/x
  3. Step 3: Cross multiply
    661,175.20x = 991,762.80 × 211,895.20
  4. Step 4: Simplify right side
    661,175.20x = 210,149,776,858.56
  5. Step 5: Solve for x
    x = 210,149,776,858.56/661,175.20
  6. Step 6: Final answer
    x = 317,842.80

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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.