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Finding the Fourth Proportional to 955.23, 1,318.49 and 557.07

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Solution

The fourth proportional to 955.23, 1,318.49 and 557.07 is: 768.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.23 : 1,318.49 = 557.07 : x
  2. Step 2: Convert to fraction form
    955.23/1,318.49 = 557.07/x
  3. Step 3: Cross multiply
    955.23x = 1,318.49 × 557.07
  4. Step 4: Simplify right side
    955.23x = 734,491.22
  5. Step 5: Solve for x
    x = 734,491.22/955.23
  6. Step 6: Final answer
    x = 768.92

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1.5x scale

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.