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Finding the Fourth Proportional to 519,889, 717,448.74 and 281,425

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Solution

The fourth proportional to 519,889, 717,448.74 and 281,425 is: 388,367.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,889 : 717,448.74 = 281,425 : x
  2. Step 2: Convert to fraction form
    519,889/717,448.74 = 281,425/x
  3. Step 3: Cross multiply
    519,889x = 717,448.74 × 281,425
  4. Step 4: Simplify right side
    519,889x = 201,908,011,654.50
  5. Step 5: Solve for x
    x = 201,908,011,654.50/519,889
  6. Step 6: Final answer
    x = 388,367.54

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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.