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Finding the Fourth Proportional to 485,869.60, 728,512.80 and 249,673.60

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Solution

The fourth proportional to 485,869.60, 728,512.80 and 249,673.60 is: 374,360.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,869.60 : 728,512.80 = 249,673.60 : x
  2. Step 2: Convert to fraction form
    485,869.60/728,512.80 = 249,673.60/x
  3. Step 3: Cross multiply
    485,869.60x = 728,512.80 × 249,673.60
  4. Step 4: Simplify right side
    485,869.60x = 181,890,413,422.08
  5. Step 5: Solve for x
    x = 181,890,413,422.08/485,869.60
  6. Step 6: Final answer
    x = 374,360.56

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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.