Home / 680,483-939,067.08-394,018.40

Finding the Fourth Proportional to 680,483, 939,067.08 and 394,018.40

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Solution

The fourth proportional to 680,483, 939,067.08 and 394,018.40 is: 543,745.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,483 : 939,067.08 = 394,018.40 : x
  2. Step 2: Convert to fraction form
    680,483/939,067.08 = 394,018.40/x
  3. Step 3: Cross multiply
    680,483x = 939,067.08 × 394,018.40
  4. Step 4: Simplify right side
    680,483x = 370,009,708,354.27
  5. Step 5: Solve for x
    x = 370,009,708,354.27/680,483
  6. Step 6: Final answer
    x = 543,745.70

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1.5x scale

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.