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Finding the Fourth Proportional to 398,633.57, 550,338.18 and 276,303.72

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Solution

The fourth proportional to 398,633.57, 550,338.18 and 276,303.72 is: 381,454.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,633.57 : 550,338.18 = 276,303.72 : x
  2. Step 2: Convert to fraction form
    398,633.57/550,338.18 = 276,303.72/x
  3. Step 3: Cross multiply
    398,633.57x = 550,338.18 × 276,303.72
  4. Step 4: Simplify right side
    398,633.57x = 152,060,489,146.56
  5. Step 5: Solve for x
    x = 152,060,489,146.56/398,633.57
  6. Step 6: Final answer
    x = 381,454.30

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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.