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Finding the Fourth Proportional to 308,084.21, 425,176.16 and 172,118.89

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Solution

The fourth proportional to 308,084.21, 425,176.16 and 172,118.89 is: 237,535.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,084.21 : 425,176.16 = 172,118.89 : x
  2. Step 2: Convert to fraction form
    308,084.21/425,176.16 = 172,118.89/x
  3. Step 3: Cross multiply
    308,084.21x = 425,176.16 × 172,118.89
  4. Step 4: Simplify right side
    308,084.21x = 73,180,847,650.72
  5. Step 5: Solve for x
    x = 73,180,847,650.72/308,084.21
  6. Step 6: Final answer
    x = 237,535.21

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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.