Home / 328,523.70-492,789.50-128,938.08

Finding the Fourth Proportional to 328,523.70, 492,789.50 and 128,938.08

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Solution

The fourth proportional to 328,523.70, 492,789.50 and 128,938.08 is: 193,408.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,523.70 : 492,789.50 = 128,938.08 : x
  2. Step 2: Convert to fraction form
    328,523.70/492,789.50 = 128,938.08/x
  3. Step 3: Cross multiply
    328,523.70x = 492,789.50 × 128,938.08
  4. Step 4: Simplify right side
    328,523.70x = 63,539,331,974.16
  5. Step 5: Solve for x
    x = 63,539,331,974.16/328,523.70
  6. Step 6: Final answer
    x = 193,408.67

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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.