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Finding the Fourth Proportional to 860.10, 1,289.46 and 373.11

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Solution

The fourth proportional to 860.10, 1,289.46 and 373.11 is: 559.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.10 : 1,289.46 = 373.11 : x
  2. Step 2: Convert to fraction form
    860.10/1,289.46 = 373.11/x
  3. Step 3: Cross multiply
    860.10x = 1,289.46 × 373.11
  4. Step 4: Simplify right side
    860.10x = 481,110.42
  5. Step 5: Solve for x
    x = 481,110.42/860.10
  6. Step 6: Final answer
    x = 559.37

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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.