Home / 311,615.24-429,941.94-209,784.20

Finding the Fourth Proportional to 311,615.24, 429,941.94 and 209,784.20

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Solution

The fourth proportional to 311,615.24, 429,941.94 and 209,784.20 is: 289,443.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,615.24 : 429,941.94 = 209,784.20 : x
  2. Step 2: Convert to fraction form
    311,615.24/429,941.94 = 209,784.20/x
  3. Step 3: Cross multiply
    311,615.24x = 429,941.94 × 209,784.20
  4. Step 4: Simplify right side
    311,615.24x = 90,195,025,929.35
  5. Step 5: Solve for x
    x = 90,195,025,929.35/311,615.24
  6. Step 6: Final answer
    x = 289,443.56

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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.