Home / 621,205.19-857,415.40-379,690.23

Finding the Fourth Proportional to 621,205.19, 857,415.40 and 379,690.23

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Solution

The fourth proportional to 621,205.19, 857,415.40 and 379,690.23 is: 524,065.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,205.19 : 857,415.40 = 379,690.23 : x
  2. Step 2: Convert to fraction form
    621,205.19/857,415.40 = 379,690.23/x
  3. Step 3: Cross multiply
    621,205.19x = 857,415.40 × 379,690.23
  4. Step 4: Simplify right side
    621,205.19x = 325,552,247,340.72
  5. Step 5: Solve for x
    x = 325,552,247,340.72/621,205.19
  6. Step 6: Final answer
    x = 524,065.56

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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.