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Finding the Fourth Proportional to 958.54, 1,322.30 and 647.50

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Solution

The fourth proportional to 958.54, 1,322.30 and 647.50 is: 893.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.54 : 1,322.30 = 647.50 : x
  2. Step 2: Convert to fraction form
    958.54/1,322.30 = 647.50/x
  3. Step 3: Cross multiply
    958.54x = 1,322.30 × 647.50
  4. Step 4: Simplify right side
    958.54x = 856,189.25
  5. Step 5: Solve for x
    x = 856,189.25/958.54
  6. Step 6: Final answer
    x = 893.22

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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.