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Finding the Fourth Proportional to 190,317.80, 285,476.70 and 172,821.80

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Solution

The fourth proportional to 190,317.80, 285,476.70 and 172,821.80 is: 259,232.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,317.80 : 285,476.70 = 172,821.80 : x
  2. Step 2: Convert to fraction form
    190,317.80/285,476.70 = 172,821.80/x
  3. Step 3: Cross multiply
    190,317.80x = 285,476.70 × 172,821.80
  4. Step 4: Simplify right side
    190,317.80x = 49,336,597,152.06
  5. Step 5: Solve for x
    x = 49,336,597,152.06/190,317.80
  6. Step 6: Final answer
    x = 259,232.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.