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Finding the Fourth Proportional to 398,012.70, 548,323.11 and 276,946.05

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Solution

The fourth proportional to 398,012.70, 548,323.11 and 276,946.05 is: 381,535.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,012.70 : 548,323.11 = 276,946.05 : x
  2. Step 2: Convert to fraction form
    398,012.70/548,323.11 = 276,946.05/x
  3. Step 3: Cross multiply
    398,012.70x = 548,323.11 × 276,946.05
  4. Step 4: Simplify right side
    398,012.70x = 151,855,919,438.22
  5. Step 5: Solve for x
    x = 151,855,919,438.22/398,012.70
  6. Step 6: Final answer
    x = 381,535.36

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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.