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Finding the Fourth Proportional to 553,583.44, 763,947.48 and 311,868.91

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Solution

The fourth proportional to 553,583.44, 763,947.48 and 311,868.91 is: 430,380.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,583.44 : 763,947.48 = 311,868.91 : x
  2. Step 2: Convert to fraction form
    553,583.44/763,947.48 = 311,868.91/x
  3. Step 3: Cross multiply
    553,583.44x = 763,947.48 × 311,868.91
  4. Step 4: Simplify right side
    553,583.44x = 238,251,467,884.85
  5. Step 5: Solve for x
    x = 238,251,467,884.85/553,583.44
  6. Step 6: Final answer
    x = 430,380.41

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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.