Home / 209,420.17-311,761.66-208,174.61

Finding the Fourth Proportional to 209,420.17, 311,761.66 and 208,174.61

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Solution

The fourth proportional to 209,420.17, 311,761.66 and 208,174.61 is: 309,907.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,420.17 : 311,761.66 = 208,174.61 : x
  2. Step 2: Convert to fraction form
    209,420.17/311,761.66 = 208,174.61/x
  3. Step 3: Cross multiply
    209,420.17x = 311,761.66 × 208,174.61
  4. Step 4: Simplify right side
    209,420.17x = 64,900,862,242.42
  5. Step 5: Solve for x
    x = 64,900,862,242.42/209,420.17
  6. Step 6: Final answer
    x = 309,907.41

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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.