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Finding the Fourth Proportional to 485,322.60, 727,983.90 and 440,999.40

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Solution

The fourth proportional to 485,322.60, 727,983.90 and 440,999.40 is: 661,499.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,322.60 : 727,983.90 = 440,999.40 : x
  2. Step 2: Convert to fraction form
    485,322.60/727,983.90 = 440,999.40/x
  3. Step 3: Cross multiply
    485,322.60x = 727,983.90 × 440,999.40
  4. Step 4: Simplify right side
    485,322.60x = 321,040,463,109.66
  5. Step 5: Solve for x
    x = 321,040,463,109.66/485,322.60
  6. Step 6: Final answer
    x = 661,499.10

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Similar ratio
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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.