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Finding the Fourth Proportional to 830.67, 1,245.16 and 368.70

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Solution

The fourth proportional to 830.67, 1,245.16 and 368.70 is: 552.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.67 : 1,245.16 = 368.70 : x
  2. Step 2: Convert to fraction form
    830.67/1,245.16 = 368.70/x
  3. Step 3: Cross multiply
    830.67x = 1,245.16 × 368.70
  4. Step 4: Simplify right side
    830.67x = 459,090.49
  5. Step 5: Solve for x
    x = 459,090.49/830.67
  6. Step 6: Final answer
    x = 552.67

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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.