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Finding the Fourth Proportional to 830.07, 1,245.37 and 343.35

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Solution

The fourth proportional to 830.07, 1,245.37 and 343.35 is: 515.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.07 : 1,245.37 = 343.35 : x
  2. Step 2: Convert to fraction form
    830.07/1,245.37 = 343.35/x
  3. Step 3: Cross multiply
    830.07x = 1,245.37 × 343.35
  4. Step 4: Simplify right side
    830.07x = 427,597.79
  5. Step 5: Solve for x
    x = 427,597.79/830.07
  6. Step 6: Final answer
    x = 515.13

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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.