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Finding the Fourth Proportional to 315,987.78, 436,291.46 and 195,294.54

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Solution

The fourth proportional to 315,987.78, 436,291.46 and 195,294.54 is: 269,647.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,987.78 : 436,291.46 = 195,294.54 : x
  2. Step 2: Convert to fraction form
    315,987.78/436,291.46 = 195,294.54/x
  3. Step 3: Cross multiply
    315,987.78x = 436,291.46 × 195,294.54
  4. Step 4: Simplify right side
    315,987.78x = 85,205,342,477.14
  5. Step 5: Solve for x
    x = 85,205,342,477.14/315,987.78
  6. Step 6: Final answer
    x = 269,647.58

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Double scale
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Similar ratio
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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.