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Finding the Fourth Proportional to 612,162.75, 917,718.23 and 212,751.63

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Solution

The fourth proportional to 612,162.75, 917,718.23 and 212,751.63 is: 318,944.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,162.75 : 917,718.23 = 212,751.63 : x
  2. Step 2: Convert to fraction form
    612,162.75/917,718.23 = 212,751.63/x
  3. Step 3: Cross multiply
    612,162.75x = 917,718.23 × 212,751.63
  4. Step 4: Simplify right side
    612,162.75x = 195,246,048,249.46
  5. Step 5: Solve for x
    x = 195,246,048,249.46/612,162.75
  6. Step 6: Final answer
    x = 318,944.67

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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.