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Finding the Fourth Proportional to 209,990.55, 315,133.45 and 189,913.89

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Solution

The fourth proportional to 209,990.55, 315,133.45 and 189,913.89 is: 285,004.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,990.55 : 315,133.45 = 189,913.89 : x
  2. Step 2: Convert to fraction form
    209,990.55/315,133.45 = 189,913.89/x
  3. Step 3: Cross multiply
    209,990.55x = 315,133.45 × 189,913.89
  4. Step 4: Simplify right side
    209,990.55x = 59,848,219,358.62
  5. Step 5: Solve for x
    x = 59,848,219,358.62/209,990.55
  6. Step 6: Final answer
    x = 285,004.35

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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.