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Finding the Fourth Proportional to 661,224.55, 991,930.23 and 211,840.30

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Solution

The fourth proportional to 661,224.55, 991,930.23 and 211,840.30 is: 317,790.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,224.55 : 991,930.23 = 211,840.30 : x
  2. Step 2: Convert to fraction form
    661,224.55/991,930.23 = 211,840.30/x
  3. Step 3: Cross multiply
    661,224.55x = 991,930.23 × 211,840.30
  4. Step 4: Simplify right side
    661,224.55x = 210,130,797,502.27
  5. Step 5: Solve for x
    x = 210,130,797,502.27/661,224.55
  6. Step 6: Final answer
    x = 317,790.37

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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.