Home / 1,020.60-1,409.40-935.55

Finding the Fourth Proportional to 1,020.60, 1,409.40 and 935.55

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Solution

The fourth proportional to 1,020.60, 1,409.40 and 935.55 is: 1,291.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.60 : 1,409.40 = 935.55 : x
  2. Step 2: Convert to fraction form
    1,020.60/1,409.40 = 935.55/x
  3. Step 3: Cross multiply
    1,020.60x = 1,409.40 × 935.55
  4. Step 4: Simplify right side
    1,020.60x = 1,318,564.17
  5. Step 5: Solve for x
    x = 1,318,564.17/1,020.60
  6. Step 6: Final answer
    x = 1,291.95

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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.