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Finding the Fourth Proportional to 315,219.78, 435,004.74 and 171,982.80

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Solution

The fourth proportional to 315,219.78, 435,004.74 and 171,982.80 is: 237,337.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,219.78 : 435,004.74 = 171,982.80 : x
  2. Step 2: Convert to fraction form
    315,219.78/435,004.74 = 171,982.80/x
  3. Step 3: Cross multiply
    315,219.78x = 435,004.74 × 171,982.80
  4. Step 4: Simplify right side
    315,219.78x = 74,813,333,198.47
  5. Step 5: Solve for x
    x = 74,813,333,198.47/315,219.78
  6. Step 6: Final answer
    x = 237,337.05

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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.