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Finding the Fourth Proportional to 653.91, 981.09 and 435.41

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Solution

The fourth proportional to 653.91, 981.09 and 435.41 is: 653.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.91 : 981.09 = 435.41 : x
  2. Step 2: Convert to fraction form
    653.91/981.09 = 435.41/x
  3. Step 3: Cross multiply
    653.91x = 981.09 × 435.41
  4. Step 4: Simplify right side
    653.91x = 427,176.40
  5. Step 5: Solve for x
    x = 427,176.40/653.91
  6. Step 6: Final answer
    x = 653.26

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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.