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Finding the Fourth Proportional to 646,295.95, 891,912.60 and 355,920.21

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Solution

The fourth proportional to 646,295.95, 891,912.60 and 355,920.21 is: 491,183.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,295.95 : 891,912.60 = 355,920.21 : x
  2. Step 2: Convert to fraction form
    646,295.95/891,912.60 = 355,920.21/x
  3. Step 3: Cross multiply
    646,295.95x = 891,912.60 × 355,920.21
  4. Step 4: Simplify right side
    646,295.95x = 317,449,719,893.65
  5. Step 5: Solve for x
    x = 317,449,719,893.65/646,295.95
  6. Step 6: Final answer
    x = 491,183.21

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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.