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Finding the Fourth Proportional to 505.21, 696.59 and 474.07

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Solution

The fourth proportional to 505.21, 696.59 and 474.07 is: 653.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.21 : 696.59 = 474.07 : x
  2. Step 2: Convert to fraction form
    505.21/696.59 = 474.07/x
  3. Step 3: Cross multiply
    505.21x = 696.59 × 474.07
  4. Step 4: Simplify right side
    505.21x = 330,232.42
  5. Step 5: Solve for x
    x = 330,232.42/505.21
  6. Step 6: Final answer
    x = 653.65

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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.