Home / 353,228.85-487,284.42-209,887.40

Finding the Fourth Proportional to 353,228.85, 487,284.42 and 209,887.40

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Solution

The fourth proportional to 353,228.85, 487,284.42 and 209,887.40 is: 289,542.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,228.85 : 487,284.42 = 209,887.40 : x
  2. Step 2: Convert to fraction form
    353,228.85/487,284.42 = 209,887.40/x
  3. Step 3: Cross multiply
    353,228.85x = 487,284.42 × 209,887.40
  4. Step 4: Simplify right side
    353,228.85x = 102,274,861,979.60
  5. Step 5: Solve for x
    x = 102,274,861,979.60/353,228.85
  6. Step 6: Final answer
    x = 289,542.78

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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.