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Finding the Fourth Proportional to 315,153.98, 434,915.64 and 171,917.04

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Solution

The fourth proportional to 315,153.98, 434,915.64 and 171,917.04 is: 237,247.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,153.98 : 434,915.64 = 171,917.04 : x
  2. Step 2: Convert to fraction form
    315,153.98/434,915.64 = 171,917.04/x
  3. Step 3: Cross multiply
    315,153.98x = 434,915.64 × 171,917.04
  4. Step 4: Simplify right side
    315,153.98x = 74,769,409,478.51
  5. Step 5: Solve for x
    x = 74,769,409,478.51/315,153.98
  6. Step 6: Final answer
    x = 237,247.24

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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.