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Finding the Fourth Proportional to 608.68, 913.56 and 435.34

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Solution

The fourth proportional to 608.68, 913.56 and 435.34 is: 653.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.68 : 913.56 = 435.34 : x
  2. Step 2: Convert to fraction form
    608.68/913.56 = 435.34/x
  3. Step 3: Cross multiply
    608.68x = 913.56 × 435.34
  4. Step 4: Simplify right side
    608.68x = 397,709.21
  5. Step 5: Solve for x
    x = 397,709.21/608.68
  6. Step 6: Final answer
    x = 653.40

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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.