Home / 817,745.39-1,128,488.68-455,161.47

Finding the Fourth Proportional to 817,745.39, 1,128,488.68 and 455,161.47

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Solution

The fourth proportional to 817,745.39, 1,128,488.68 and 455,161.47 is: 628,122.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,745.39 : 1,128,488.68 = 455,161.47 : x
  2. Step 2: Convert to fraction form
    817,745.39/1,128,488.68 = 455,161.47/x
  3. Step 3: Cross multiply
    817,745.39x = 1,128,488.68 × 455,161.47
  4. Step 4: Simplify right side
    817,745.39x = 513,644,565,329.26
  5. Step 5: Solve for x
    x = 513,644,565,329.26/817,745.39
  6. Step 6: Final answer
    x = 628,122.85

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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.