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Finding the Fourth Proportional to 190,431.60, 285,720.30 and 187,442.70

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Solution

The fourth proportional to 190,431.60, 285,720.30 and 187,442.70 is: 281,235.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,431.60 : 285,720.30 = 187,442.70 : x
  2. Step 2: Convert to fraction form
    190,431.60/285,720.30 = 187,442.70/x
  3. Step 3: Cross multiply
    190,431.60x = 285,720.30 × 187,442.70
  4. Step 4: Simplify right side
    190,431.60x = 53,556,184,476.81
  5. Step 5: Solve for x
    x = 53,556,184,476.81/190,431.60
  6. Step 6: Final answer
    x = 281,235.81

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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.