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Finding the Fourth Proportional to 485,723.40, 728,585.10 and 476,392.20

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Solution

The fourth proportional to 485,723.40, 728,585.10 and 476,392.20 is: 714,588.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,723.40 : 728,585.10 = 476,392.20 : x
  2. Step 2: Convert to fraction form
    485,723.40/728,585.10 = 476,392.20/x
  3. Step 3: Cross multiply
    485,723.40x = 728,585.10 × 476,392.20
  4. Step 4: Simplify right side
    485,723.40x = 347,092,258,676.22
  5. Step 5: Solve for x
    x = 347,092,258,676.22/485,723.40
  6. Step 6: Final answer
    x = 714,588.30

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.