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Finding the Fourth Proportional to 353,676.65, 487,929.56 and 217,669.55

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Solution

The fourth proportional to 353,676.65, 487,929.56 and 217,669.55 is: 300,295.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,676.65 : 487,929.56 = 217,669.55 : x
  2. Step 2: Convert to fraction form
    353,676.65/487,929.56 = 217,669.55/x
  3. Step 3: Cross multiply
    353,676.65x = 487,929.56 × 217,669.55
  4. Step 4: Simplify right side
    353,676.65x = 106,207,404,228.90
  5. Step 5: Solve for x
    x = 106,207,404,228.90/353,676.65
  6. Step 6: Final answer
    x = 300,295.22

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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.