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Finding the Fourth Proportional to 318,129, 439,020.72 and 174,885.90

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Solution

The fourth proportional to 318,129, 439,020.72 and 174,885.90 is: 241,344.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,129 : 439,020.72 = 174,885.90 : x
  2. Step 2: Convert to fraction form
    318,129/439,020.72 = 174,885.90/x
  3. Step 3: Cross multiply
    318,129x = 439,020.72 × 174,885.90
  4. Step 4: Simplify right side
    318,129x = 76,778,533,735.85
  5. Step 5: Solve for x
    x = 76,778,533,735.85/318,129
  6. Step 6: Final answer
    x = 241,344.03

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1.5x scale

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.