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Finding the Fourth Proportional to 379,465.98, 523,618.47 and 209,689.98

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Solution

The fourth proportional to 379,465.98, 523,618.47 and 209,689.98 is: 289,347.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,465.98 : 523,618.47 = 209,689.98 : x
  2. Step 2: Convert to fraction form
    379,465.98/523,618.47 = 209,689.98/x
  3. Step 3: Cross multiply
    379,465.98x = 523,618.47 × 209,689.98
  4. Step 4: Simplify right side
    379,465.98x = 109,797,546,501.93
  5. Step 5: Solve for x
    x = 109,797,546,501.93/379,465.98
  6. Step 6: Final answer
    x = 289,347.54

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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.