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Finding the Fourth Proportional to 391,641.21, 540,460.17 and 219,558.33

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Solution

The fourth proportional to 391,641.21, 540,460.17 and 219,558.33 is: 302,987.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,641.21 : 540,460.17 = 219,558.33 : x
  2. Step 2: Convert to fraction form
    391,641.21/540,460.17 = 219,558.33/x
  3. Step 3: Cross multiply
    391,641.21x = 540,460.17 × 219,558.33
  4. Step 4: Simplify right side
    391,641.21x = 118,662,532,356.72
  5. Step 5: Solve for x
    x = 118,662,532,356.72/391,641.21
  6. Step 6: Final answer
    x = 302,987.86

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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.