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Finding the Fourth Proportional to 860.41, 1,290.62 and 569.75

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Solution

The fourth proportional to 860.41, 1,290.62 and 569.75 is: 854.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.41 : 1,290.62 = 569.75 : x
  2. Step 2: Convert to fraction form
    860.41/1,290.62 = 569.75/x
  3. Step 3: Cross multiply
    860.41x = 1,290.62 × 569.75
  4. Step 4: Simplify right side
    860.41x = 735,325.72
  5. Step 5: Solve for x
    x = 735,325.72/860.41
  6. Step 6: Final answer
    x = 854.62

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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.