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Finding the Fourth Proportional to 860.66, 1,291.25 and 283.94

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Solution

The fourth proportional to 860.66, 1,291.25 and 283.94 is: 426.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.66 : 1,291.25 = 283.94 : x
  2. Step 2: Convert to fraction form
    860.66/1,291.25 = 283.94/x
  3. Step 3: Cross multiply
    860.66x = 1,291.25 × 283.94
  4. Step 4: Simplify right side
    860.66x = 366,637.53
  5. Step 5: Solve for x
    x = 366,637.53/860.66
  6. Step 6: Final answer
    x = 426.00

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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.