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Finding the Fourth Proportional to 398,765.04, 550,300.06 and 217,475.48

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Solution

The fourth proportional to 398,765.04, 550,300.06 and 217,475.48 is: 300,118.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,765.04 : 550,300.06 = 217,475.48 : x
  2. Step 2: Convert to fraction form
    398,765.04/550,300.06 = 217,475.48/x
  3. Step 3: Cross multiply
    398,765.04x = 550,300.06 × 217,475.48
  4. Step 4: Simplify right side
    398,765.04x = 119,676,769,692.53
  5. Step 5: Solve for x
    x = 119,676,769,692.53/398,765.04
  6. Step 6: Final answer
    x = 300,118.51

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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.