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Finding the Fourth Proportional to 379,466.81, 523,643.58 and 209,690

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Solution

The fourth proportional to 379,466.81, 523,643.58 and 209,690 is: 289,360.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,466.81 : 523,643.58 = 209,690 : x
  2. Step 2: Convert to fraction form
    379,466.81/523,643.58 = 209,690/x
  3. Step 3: Cross multiply
    379,466.81x = 523,643.58 × 209,690
  4. Step 4: Simplify right side
    379,466.81x = 109,802,822,290.20
  5. Step 5: Solve for x
    x = 109,802,822,290.20/379,466.81
  6. Step 6: Final answer
    x = 289,360.81

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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.