Home / 778,721.45-1,169,078.47-661,139.82

Finding the Fourth Proportional to 778,721.45, 1,169,078.47 and 661,139.82

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Solution

The fourth proportional to 778,721.45, 1,169,078.47 and 661,139.82 is: 992,555.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,721.45 : 1,169,078.47 = 661,139.82 : x
  2. Step 2: Convert to fraction form
    778,721.45/1,169,078.47 = 661,139.82/x
  3. Step 3: Cross multiply
    778,721.45x = 1,169,078.47 × 661,139.82
  4. Step 4: Simplify right side
    778,721.45x = 772,924,327,568.83
  5. Step 5: Solve for x
    x = 772,924,327,568.83/778,721.45
  6. Step 6: Final answer
    x = 992,555.60

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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.