Home / 817,745.54-1,128,488.72-455,161.55

Finding the Fourth Proportional to 817,745.54, 1,128,488.72 and 455,161.55

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Solution

The fourth proportional to 817,745.54, 1,128,488.72 and 455,161.55 is: 628,122.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,745.54 : 1,128,488.72 = 455,161.55 : x
  2. Step 2: Convert to fraction form
    817,745.54/1,128,488.72 = 455,161.55/x
  3. Step 3: Cross multiply
    817,745.54x = 1,128,488.72 × 455,161.55
  4. Step 4: Simplify right side
    817,745.54x = 513,644,667,034.47
  5. Step 5: Solve for x
    x = 513,644,667,034.47/817,745.54
  6. Step 6: Final answer
    x = 628,122.86

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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.