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Finding the Fourth Proportional to 519,689, 717,171.18 and 281,225

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Solution

The fourth proportional to 519,689, 717,171.18 and 281,225 is: 388,090.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,689 : 717,171.18 = 281,225 : x
  2. Step 2: Convert to fraction form
    519,689/717,171.18 = 281,225/x
  3. Step 3: Cross multiply
    519,689x = 717,171.18 × 281,225
  4. Step 4: Simplify right side
    519,689x = 201,686,465,095.50
  5. Step 5: Solve for x
    x = 201,686,465,095.50/519,689
  6. Step 6: Final answer
    x = 388,090.69

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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.