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Finding the Fourth Proportional to 391,992.17, 540,916.52 and 219,886.20

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Solution

The fourth proportional to 391,992.17, 540,916.52 and 219,886.20 is: 303,424.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,992.17 : 540,916.52 = 219,886.20 : x
  2. Step 2: Convert to fraction form
    391,992.17/540,916.52 = 219,886.20/x
  3. Step 3: Cross multiply
    391,992.17x = 540,916.52 × 219,886.20
  4. Step 4: Simplify right side
    391,992.17x = 118,940,077,000.59
  5. Step 5: Solve for x
    x = 118,940,077,000.59/391,992.17
  6. Step 6: Final answer
    x = 303,424.63

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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.