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Finding the Fourth Proportional to 860.28, 1,290.89 and 373.33

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Solution

The fourth proportional to 860.28, 1,290.89 and 373.33 is: 560.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.28 : 1,290.89 = 373.33 : x
  2. Step 2: Convert to fraction form
    860.28/1,290.89 = 373.33/x
  3. Step 3: Cross multiply
    860.28x = 1,290.89 × 373.33
  4. Step 4: Simplify right side
    860.28x = 481,927.96
  5. Step 5: Solve for x
    x = 481,927.96/860.28
  6. Step 6: Final answer
    x = 560.20

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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.