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Finding the Fourth Proportional to 315,148.42, 434,910.90 and 171,913.69

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Solution

The fourth proportional to 315,148.42, 434,910.90 and 171,913.69 is: 237,244.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,148.42 : 434,910.90 = 171,913.69 : x
  2. Step 2: Convert to fraction form
    315,148.42/434,910.90 = 171,913.69/x
  3. Step 3: Cross multiply
    315,148.42x = 434,910.90 × 171,913.69
  4. Step 4: Simplify right side
    315,148.42x = 74,767,137,640.22
  5. Step 5: Solve for x
    x = 74,767,137,640.22/315,148.42
  6. Step 6: Final answer
    x = 237,244.21

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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.