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Finding the Fourth Proportional to 952.74, 1,313.64 and 621.05

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Solution

The fourth proportional to 952.74, 1,313.64 and 621.05 is: 856.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    952.74 : 1,313.64 = 621.05 : x
  2. Step 2: Convert to fraction form
    952.74/1,313.64 = 621.05/x
  3. Step 3: Cross multiply
    952.74x = 1,313.64 × 621.05
  4. Step 4: Simplify right side
    952.74x = 815,829.55
  5. Step 5: Solve for x
    x = 815,829.55/952.74
  6. Step 6: Final answer
    x = 856.30

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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.