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Finding the Fourth Proportional to 391,183.43, 539,303.06 and 334,432.40

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Solution

The fourth proportional to 391,183.43, 539,303.06 and 334,432.40 is: 461,063.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,183.43 : 539,303.06 = 334,432.40 : x
  2. Step 2: Convert to fraction form
    391,183.43/539,303.06 = 334,432.40/x
  3. Step 3: Cross multiply
    391,183.43x = 539,303.06 × 334,432.40
  4. Step 4: Simplify right side
    391,183.43x = 180,360,414,822.71
  5. Step 5: Solve for x
    x = 180,360,414,822.71/391,183.43
  6. Step 6: Final answer
    x = 461,063.54

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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.