Home / 209,445.78-311,799.62-208,200.18

Finding the Fourth Proportional to 209,445.78, 311,799.62 and 208,200.18

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Solution

The fourth proportional to 209,445.78, 311,799.62 and 208,200.18 is: 309,945.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,445.78 : 311,799.62 = 208,200.18 : x
  2. Step 2: Convert to fraction form
    209,445.78/311,799.62 = 208,200.18/x
  3. Step 3: Cross multiply
    209,445.78x = 311,799.62 × 208,200.18
  4. Step 4: Simplify right side
    209,445.78x = 64,916,735,966.93
  5. Step 5: Solve for x
    x = 64,916,735,966.93/209,445.78
  6. Step 6: Final answer
    x = 309,945.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.