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Finding the Fourth Proportional to 661,255.60, 991,883.40 and 425,059.60

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Solution

The fourth proportional to 661,255.60, 991,883.40 and 425,059.60 is: 637,589.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,255.60 : 991,883.40 = 425,059.60 : x
  2. Step 2: Convert to fraction form
    661,255.60/991,883.40 = 425,059.60/x
  3. Step 3: Cross multiply
    661,255.60x = 991,883.40 × 425,059.60
  4. Step 4: Simplify right side
    661,255.60x = 421,609,561,250.64
  5. Step 5: Solve for x
    x = 421,609,561,250.64/661,255.60
  6. Step 6: Final answer
    x = 637,589.40

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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.