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Finding the Fourth Proportional to 485,845.90, 728,990.28 and 249,354.65

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Solution

The fourth proportional to 485,845.90, 728,990.28 and 249,354.65 is: 374,145.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,845.90 : 728,990.28 = 249,354.65 : x
  2. Step 2: Convert to fraction form
    485,845.90/728,990.28 = 249,354.65/x
  3. Step 3: Cross multiply
    485,845.90x = 728,990.28 × 249,354.65
  4. Step 4: Simplify right side
    485,845.90x = 181,777,117,945.28
  5. Step 5: Solve for x
    x = 181,777,117,945.28/485,845.90
  6. Step 6: Final answer
    x = 374,145.63

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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.