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Finding the Fourth Proportional to 212,643.10, 318,636.60 and 184,430.80

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Solution

The fourth proportional to 212,643.10, 318,636.60 and 184,430.80 is: 276,361.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,643.10 : 318,636.60 = 184,430.80 : x
  2. Step 2: Convert to fraction form
    212,643.10/318,636.60 = 184,430.80/x
  3. Step 3: Cross multiply
    212,643.10x = 318,636.60 × 184,430.80
  4. Step 4: Simplify right side
    212,643.10x = 58,766,403,047.28
  5. Step 5: Solve for x
    x = 58,766,403,047.28/212,643.10
  6. Step 6: Final answer
    x = 276,361.67

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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.