Home / 396,128.36-546,020.48-309,938.69

Finding the Fourth Proportional to 396,128.36, 546,020.48 and 309,938.69

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Solution

The fourth proportional to 396,128.36, 546,020.48 and 309,938.69 is: 427,217.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,128.36 : 546,020.48 = 309,938.69 : x
  2. Step 2: Convert to fraction form
    396,128.36/546,020.48 = 309,938.69/x
  3. Step 3: Cross multiply
    396,128.36x = 546,020.48 × 309,938.69
  4. Step 4: Simplify right side
    396,128.36x = 169,232,874,424.27
  5. Step 5: Solve for x
    x = 169,232,874,424.27/396,128.36
  6. Step 6: Final answer
    x = 427,217.26

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1.5x scale

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.