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Finding the Fourth Proportional to 557.10, 767.04 and 490.67

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Solution

The fourth proportional to 557.10, 767.04 and 490.67 is: 675.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.10 : 767.04 = 490.67 : x
  2. Step 2: Convert to fraction form
    557.10/767.04 = 490.67/x
  3. Step 3: Cross multiply
    557.10x = 767.04 × 490.67
  4. Step 4: Simplify right side
    557.10x = 376,362.56
  5. Step 5: Solve for x
    x = 376,362.56/557.10
  6. Step 6: Final answer
    x = 675.57

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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.