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Finding the Fourth Proportional to 661,430.52, 991,504.26 and 261,938.52

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Solution

The fourth proportional to 661,430.52, 991,504.26 and 261,938.52 is: 392,653.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,430.52 : 991,504.26 = 261,938.52 : x
  2. Step 2: Convert to fraction form
    661,430.52/991,504.26 = 261,938.52/x
  3. Step 3: Cross multiply
    661,430.52x = 991,504.26 × 261,938.52
  4. Step 4: Simplify right side
    661,430.52x = 259,713,158,438.10
  5. Step 5: Solve for x
    x = 259,713,158,438.10/661,430.52
  6. Step 6: Final answer
    x = 392,653.73

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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.