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Finding the Fourth Proportional to 661,213.12, 991,237.92 and 262,134.40

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Solution

The fourth proportional to 661,213.12, 991,237.92 and 262,134.40 is: 392,970.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,213.12 : 991,237.92 = 262,134.40 : x
  2. Step 2: Convert to fraction form
    661,213.12/991,237.92 = 262,134.40/x
  3. Step 3: Cross multiply
    661,213.12x = 991,237.92 × 262,134.40
  4. Step 4: Simplify right side
    661,213.12x = 259,837,557,416.45
  5. Step 5: Solve for x
    x = 259,837,557,416.45/661,213.12
  6. Step 6: Final answer
    x = 392,970.96

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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.