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Finding the Fourth Proportional to 391,029.41, 539,618.69 and 212,181.41

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Solution

The fourth proportional to 391,029.41, 539,618.69 and 212,181.41 is: 292,809.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,029.41 : 539,618.69 = 212,181.41 : x
  2. Step 2: Convert to fraction form
    391,029.41/539,618.69 = 212,181.41/x
  3. Step 3: Cross multiply
    391,029.41x = 539,618.69 × 212,181.41
  4. Step 4: Simplify right side
    391,029.41x = 114,497,053,445.65
  5. Step 5: Solve for x
    x = 114,497,053,445.65/391,029.41
  6. Step 6: Final answer
    x = 292,809.31

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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.