Home / 1,288,657.78-1,778,290.17-772,696.45

Finding the Fourth Proportional to 1,288,657.78, 1,778,290.17 and 772,696.45

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Solution

The fourth proportional to 1,288,657.78, 1,778,290.17 and 772,696.45 is: 1,066,286.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,657.78 : 1,778,290.17 = 772,696.45 : x
  2. Step 2: Convert to fraction form
    1,288,657.78/1,778,290.17 = 772,696.45/x
  3. Step 3: Cross multiply
    1,288,657.78x = 1,778,290.17 × 772,696.45
  4. Step 4: Simplify right side
    1,288,657.78x = 1,374,078,501,428.90
  5. Step 5: Solve for x
    x = 1,374,078,501,428.90/1,288,657.78
  6. Step 6: Final answer
    x = 1,066,286.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.