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Finding the Fourth Proportional to 603.21, 830.94 and 514.40

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Solution

The fourth proportional to 603.21, 830.94 and 514.40 is: 708.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.21 : 830.94 = 514.40 : x
  2. Step 2: Convert to fraction form
    603.21/830.94 = 514.40/x
  3. Step 3: Cross multiply
    603.21x = 830.94 × 514.40
  4. Step 4: Simplify right side
    603.21x = 427,434.89
  5. Step 5: Solve for x
    x = 427,434.89/603.21
  6. Step 6: Final answer
    x = 708.60

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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.