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Finding the Fourth Proportional to 658,489.96, 987,056.96 and 258,968.80

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Solution

The fourth proportional to 658,489.96, 987,056.96 and 258,968.80 is: 388,186.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,489.96 : 987,056.96 = 258,968.80 : x
  2. Step 2: Convert to fraction form
    658,489.96/987,056.96 = 258,968.80/x
  3. Step 3: Cross multiply
    658,489.96x = 987,056.96 × 258,968.80
  4. Step 4: Simplify right side
    658,489.96x = 255,616,956,462.85
  5. Step 5: Solve for x
    x = 255,616,956,462.85/658,489.96
  6. Step 6: Final answer
    x = 388,186.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.