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Finding the Fourth Proportional to 650.78, 975.53 and 260.67

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Solution

The fourth proportional to 650.78, 975.53 and 260.67 is: 390.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.78 : 975.53 = 260.67 : x
  2. Step 2: Convert to fraction form
    650.78/975.53 = 260.67/x
  3. Step 3: Cross multiply
    650.78x = 975.53 × 260.67
  4. Step 4: Simplify right side
    650.78x = 254,290.10
  5. Step 5: Solve for x
    x = 254,290.10/650.78
  6. Step 6: Final answer
    x = 390.75

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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.