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Finding the Fourth Proportional to 860.07, 1,290.62 and 366.45

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Solution

The fourth proportional to 860.07, 1,290.62 and 366.45 is: 549.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.07 : 1,290.62 = 366.45 : x
  2. Step 2: Convert to fraction form
    860.07/1,290.62 = 366.45/x
  3. Step 3: Cross multiply
    860.07x = 1,290.62 × 366.45
  4. Step 4: Simplify right side
    860.07x = 472,945.87
  5. Step 5: Solve for x
    x = 472,945.87/860.07
  6. Step 6: Final answer
    x = 549.89

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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.