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Finding the Fourth Proportional to 318,428.85, 439,431.79 and 175,185.81

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Solution

The fourth proportional to 318,428.85, 439,431.79 and 175,185.81 is: 241,756.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,428.85 : 439,431.79 = 175,185.81 : x
  2. Step 2: Convert to fraction form
    318,428.85/439,431.79 = 175,185.81/x
  3. Step 3: Cross multiply
    318,428.85x = 439,431.79 × 175,185.81
  4. Step 4: Simplify right side
    318,428.85x = 76,982,214,070.90
  5. Step 5: Solve for x
    x = 76,982,214,070.90/318,428.85
  6. Step 6: Final answer
    x = 241,756.41

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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.