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Finding the Fourth Proportional to 428,736.41, 642,544 and 175,720.67

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Solution

The fourth proportional to 428,736.41, 642,544 and 175,720.67 is: 263,351.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,736.41 : 642,544 = 175,720.67 : x
  2. Step 2: Convert to fraction form
    428,736.41/642,544 = 175,720.67/x
  3. Step 3: Cross multiply
    428,736.41x = 642,544 × 175,720.67
  4. Step 4: Simplify right side
    428,736.41x = 112,908,262,184.48
  5. Step 5: Solve for x
    x = 112,908,262,184.48/428,736.41
  6. Step 6: Final answer
    x = 263,351.23

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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.