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Finding the Fourth Proportional to 397,390.50, 548,401.48 and 216,104.40

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Solution

The fourth proportional to 397,390.50, 548,401.48 and 216,104.40 is: 298,225.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,390.50 : 548,401.48 = 216,104.40 : x
  2. Step 2: Convert to fraction form
    397,390.50/548,401.48 = 216,104.40/x
  3. Step 3: Cross multiply
    397,390.50x = 548,401.48 × 216,104.40
  4. Step 4: Simplify right side
    397,390.50x = 118,511,972,794.51
  5. Step 5: Solve for x
    x = 118,511,972,794.51/397,390.50
  6. Step 6: Final answer
    x = 298,225.48

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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.