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Finding the Fourth Proportional to 661,090.90, 911,993.84 and 479,404.26

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Solution

The fourth proportional to 661,090.90, 911,993.84 and 479,404.26 is: 661,351.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,090.90 : 911,993.84 = 479,404.26 : x
  2. Step 2: Convert to fraction form
    661,090.90/911,993.84 = 479,404.26/x
  3. Step 3: Cross multiply
    661,090.90x = 911,993.84 × 479,404.26
  4. Step 4: Simplify right side
    661,090.90x = 437,213,731,989.76
  5. Step 5: Solve for x
    x = 437,213,731,989.76/661,090.90
  6. Step 6: Final answer
    x = 661,351.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.