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Finding the Fourth Proportional to 485,367.40, 728,051.10 and 383,890.60

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Solution

The fourth proportional to 485,367.40, 728,051.10 and 383,890.60 is: 575,835.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,367.40 : 728,051.10 = 383,890.60 : x
  2. Step 2: Convert to fraction form
    485,367.40/728,051.10 = 383,890.60/x
  3. Step 3: Cross multiply
    485,367.40x = 728,051.10 × 383,890.60
  4. Step 4: Simplify right side
    485,367.40x = 279,491,973,609.66
  5. Step 5: Solve for x
    x = 279,491,973,609.66/485,367.40
  6. Step 6: Final answer
    x = 575,835.90

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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.