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Finding the Fourth Proportional to 391,437.96, 540,186.44 and 219,356.32

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Solution

The fourth proportional to 391,437.96, 540,186.44 and 219,356.32 is: 302,712.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,437.96 : 540,186.44 = 219,356.32 : x
  2. Step 2: Convert to fraction form
    391,437.96/540,186.44 = 219,356.32/x
  3. Step 3: Cross multiply
    391,437.96x = 540,186.44 × 219,356.32
  4. Step 4: Simplify right side
    391,437.96x = 118,493,309,592.30
  5. Step 5: Solve for x
    x = 118,493,309,592.30/391,437.96
  6. Step 6: Final answer
    x = 302,712.87

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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.