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Finding the Fourth Proportional to 421,173, 580,884.36 and 318,150.96

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Solution

The fourth proportional to 421,173, 580,884.36 and 318,150.96 is: 438,795.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,173 : 580,884.36 = 318,150.96 : x
  2. Step 2: Convert to fraction form
    421,173/580,884.36 = 318,150.96/x
  3. Step 3: Cross multiply
    421,173x = 580,884.36 × 318,150.96
  4. Step 4: Simplify right side
    421,173x = 184,808,916,782.99
  5. Step 5: Solve for x
    x = 184,808,916,782.99/421,173
  6. Step 6: Final answer
    x = 438,795.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.