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Finding the Fourth Proportional to 603.18, 830.25 and 555.39

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Solution

The fourth proportional to 603.18, 830.25 and 555.39 is: 764.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.18 : 830.25 = 555.39 : x
  2. Step 2: Convert to fraction form
    603.18/830.25 = 555.39/x
  3. Step 3: Cross multiply
    603.18x = 830.25 × 555.39
  4. Step 4: Simplify right side
    603.18x = 461,112.55
  5. Step 5: Solve for x
    x = 461,112.55/603.18
  6. Step 6: Final answer
    x = 764.47

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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.