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Finding the Fourth Proportional to 407.87, 612.72 and 245.67

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Solution

The fourth proportional to 407.87, 612.72 and 245.67 is: 369.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.87 : 612.72 = 245.67 : x
  2. Step 2: Convert to fraction form
    407.87/612.72 = 245.67/x
  3. Step 3: Cross multiply
    407.87x = 612.72 × 245.67
  4. Step 4: Simplify right side
    407.87x = 150,526.92
  5. Step 5: Solve for x
    x = 150,526.92/407.87
  6. Step 6: Final answer
    x = 369.06

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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.