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Finding the Fourth Proportional to 391,283.26, 540,005.06 and 219,198.42

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Solution

The fourth proportional to 391,283.26, 540,005.06 and 219,198.42 is: 302,512.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,283.26 : 540,005.06 = 219,198.42 : x
  2. Step 2: Convert to fraction form
    391,283.26/540,005.06 = 219,198.42/x
  3. Step 3: Cross multiply
    391,283.26x = 540,005.06 × 219,198.42
  4. Step 4: Simplify right side
    391,283.26x = 118,368,256,492.00
  5. Step 5: Solve for x
    x = 118,368,256,492.00/391,283.26
  6. Step 6: Final answer
    x = 302,512.96

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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.