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Finding the Fourth Proportional to 1,365.94, 1,885.05 and 868.57

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Solution

The fourth proportional to 1,365.94, 1,885.05 and 868.57 is: 1,198.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,365.94 : 1,885.05 = 868.57 : x
  2. Step 2: Convert to fraction form
    1,365.94/1,885.05 = 868.57/x
  3. Step 3: Cross multiply
    1,365.94x = 1,885.05 × 868.57
  4. Step 4: Simplify right side
    1,365.94x = 1,637,302.00
  5. Step 5: Solve for x
    x = 1,637,302.00/1,365.94
  6. Step 6: Final answer
    x = 1,198.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.