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Finding the Fourth Proportional to 342,528.90, 512,809.20 and 209,668.65

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Solution

The fourth proportional to 342,528.90, 512,809.20 and 209,668.65 is: 313,900.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,528.90 : 512,809.20 = 209,668.65 : x
  2. Step 2: Convert to fraction form
    342,528.90/512,809.20 = 209,668.65/x
  3. Step 3: Cross multiply
    342,528.90x = 512,809.20 × 209,668.65
  4. Step 4: Simplify right side
    342,528.90x = 107,520,012,671.58
  5. Step 5: Solve for x
    x = 107,520,012,671.58/342,528.90
  6. Step 6: Final answer
    x = 313,900.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.