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Finding the Fourth Proportional to 190,316.80, 285,475.20 and 172,820.80

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Solution

The fourth proportional to 190,316.80, 285,475.20 and 172,820.80 is: 259,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,316.80 : 285,475.20 = 172,820.80 : x
  2. Step 2: Convert to fraction form
    190,316.80/285,475.20 = 172,820.80/x
  3. Step 3: Cross multiply
    190,316.80x = 285,475.20 × 172,820.80
  4. Step 4: Simplify right side
    190,316.80x = 49,336,052,444.16
  5. Step 5: Solve for x
    x = 49,336,052,444.16/190,316.80
  6. Step 6: Final answer
    x = 259,231.20

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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.