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Finding the Fourth Proportional to 965.56, 1,447.12 and 417.10

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Solution

The fourth proportional to 965.56, 1,447.12 and 417.10 is: 625.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.56 : 1,447.12 = 417.10 : x
  2. Step 2: Convert to fraction form
    965.56/1,447.12 = 417.10/x
  3. Step 3: Cross multiply
    965.56x = 1,447.12 × 417.10
  4. Step 4: Simplify right side
    965.56x = 603,593.75
  5. Step 5: Solve for x
    x = 603,593.75/965.56
  6. Step 6: Final answer
    x = 625.12

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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.