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Finding the Fourth Proportional to 965.18, 1,445.94 and 553.07

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Solution

The fourth proportional to 965.18, 1,445.94 and 553.07 is: 828.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.18 : 1,445.94 = 553.07 : x
  2. Step 2: Convert to fraction form
    965.18/1,445.94 = 553.07/x
  3. Step 3: Cross multiply
    965.18x = 1,445.94 × 553.07
  4. Step 4: Simplify right side
    965.18x = 799,709.65
  5. Step 5: Solve for x
    x = 799,709.65/965.18
  6. Step 6: Final answer
    x = 828.56

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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.