Home / 1,089.40-1,627.19-935.77

Finding the Fourth Proportional to 1,089.40, 1,627.19 and 935.77

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Solution

The fourth proportional to 1,089.40, 1,627.19 and 935.77 is: 1,397.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.40 : 1,627.19 = 935.77 : x
  2. Step 2: Convert to fraction form
    1,089.40/1,627.19 = 935.77/x
  3. Step 3: Cross multiply
    1,089.40x = 1,627.19 × 935.77
  4. Step 4: Simplify right side
    1,089.40x = 1,522,675.59
  5. Step 5: Solve for x
    x = 1,522,675.59/1,089.40
  6. Step 6: Final answer
    x = 1,397.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.