Home / 1,288,652.78-1,778,283.27-772,691.46

Finding the Fourth Proportional to 1,288,652.78, 1,778,283.27 and 772,691.46

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Solution

The fourth proportional to 1,288,652.78, 1,778,283.27 and 772,691.46 is: 1,066,279.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,652.78 : 1,778,283.27 = 772,691.46 : x
  2. Step 2: Convert to fraction form
    1,288,652.78/1,778,283.27 = 772,691.46/x
  3. Step 3: Cross multiply
    1,288,652.78x = 1,778,283.27 × 772,691.46
  4. Step 4: Simplify right side
    1,288,652.78x = 1,374,064,296,189.87
  5. Step 5: Solve for x
    x = 1,374,064,296,189.87/1,288,652.78
  6. Step 6: Final answer
    x = 1,066,279.70

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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.