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Finding the Fourth Proportional to 397,398.03, 548,411.90 and 216,111.93

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Solution

The fourth proportional to 397,398.03, 548,411.90 and 216,111.93 is: 298,235.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,398.03 : 548,411.90 = 216,111.93 : x
  2. Step 2: Convert to fraction form
    397,398.03/548,411.90 = 216,111.93/x
  3. Step 3: Cross multiply
    397,398.03x = 548,411.90 × 216,111.93
  4. Step 4: Simplify right side
    397,398.03x = 118,518,353,063.41
  5. Step 5: Solve for x
    x = 118,518,353,063.41/397,398.03
  6. Step 6: Final answer
    x = 298,235.88

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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.