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Finding the Fourth Proportional to 398,670.08, 550,144.46 and 217,380.53

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Solution

The fourth proportional to 398,670.08, 550,144.46 and 217,380.53 is: 299,974.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,670.08 : 550,144.46 = 217,380.53 : x
  2. Step 2: Convert to fraction form
    398,670.08/550,144.46 = 217,380.53/x
  3. Step 3: Cross multiply
    398,670.08x = 550,144.46 × 217,380.53
  4. Step 4: Simplify right side
    398,670.08x = 119,590,696,210.18
  5. Step 5: Solve for x
    x = 119,590,696,210.18/398,670.08
  6. Step 6: Final answer
    x = 299,974.10

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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.