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Finding the Fourth Proportional to 245,820.48, 339,212.88 and 138,369.12

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Solution

The fourth proportional to 245,820.48, 339,212.88 and 138,369.12 is: 190,938.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,820.48 : 339,212.88 = 138,369.12 : x
  2. Step 2: Convert to fraction form
    245,820.48/339,212.88 = 138,369.12/x
  3. Step 3: Cross multiply
    245,820.48x = 339,212.88 × 138,369.12
  4. Step 4: Simplify right side
    245,820.48x = 46,936,587,698.27
  5. Step 5: Solve for x
    x = 46,936,587,698.27/245,820.48
  6. Step 6: Final answer
    x = 190,938.48

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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.