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Finding the Fourth Proportional to 746.15, 1,119.45 and 553.67

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Solution

The fourth proportional to 746.15, 1,119.45 and 553.67 is: 830.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.15 : 1,119.45 = 553.67 : x
  2. Step 2: Convert to fraction form
    746.15/1,119.45 = 553.67/x
  3. Step 3: Cross multiply
    746.15x = 1,119.45 × 553.67
  4. Step 4: Simplify right side
    746.15x = 619,805.88
  5. Step 5: Solve for x
    x = 619,805.88/746.15
  6. Step 6: Final answer
    x = 830.67

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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.