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Finding the Fourth Proportional to 485,426.81, 728,245.31 and 185,907.44

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Solution

The fourth proportional to 485,426.81, 728,245.31 and 185,907.44 is: 278,901.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,426.81 : 728,245.31 = 185,907.44 : x
  2. Step 2: Convert to fraction form
    485,426.81/728,245.31 = 185,907.44/x
  3. Step 3: Cross multiply
    485,426.81x = 728,245.31 × 185,907.44
  4. Step 4: Simplify right side
    485,426.81x = 135,386,216,703.34
  5. Step 5: Solve for x
    x = 135,386,216,703.34/485,426.81
  6. Step 6: Final answer
    x = 278,901.40

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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.