Home / 1,272,043.80-1,906,879.86-430,006.68

Finding the Fourth Proportional to 1,272,043.80, 1,906,879.86 and 430,006.68

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Solution

The fourth proportional to 1,272,043.80, 1,906,879.86 and 430,006.68 is: 644,609.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,043.80 : 1,906,879.86 = 430,006.68 : x
  2. Step 2: Convert to fraction form
    1,272,043.80/1,906,879.86 = 430,006.68/x
  3. Step 3: Cross multiply
    1,272,043.80x = 1,906,879.86 × 430,006.68
  4. Step 4: Simplify right side
    1,272,043.80x = 819,971,077,757.47
  5. Step 5: Solve for x
    x = 819,971,077,757.47/1,272,043.80
  6. Step 6: Final answer
    x = 644,609.15

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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.