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Finding the Fourth Proportional to 456,415.80, 684,623.70 and 190,087.80

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Solution

The fourth proportional to 456,415.80, 684,623.70 and 190,087.80 is: 285,131.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,415.80 : 684,623.70 = 190,087.80 : x
  2. Step 2: Convert to fraction form
    456,415.80/684,623.70 = 190,087.80/x
  3. Step 3: Cross multiply
    456,415.80x = 684,623.70 × 190,087.80
  4. Step 4: Simplify right side
    456,415.80x = 130,138,612,960.86
  5. Step 5: Solve for x
    x = 130,138,612,960.86/456,415.80
  6. Step 6: Final answer
    x = 285,131.70

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Similar ratio
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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.