Home / 1,135.15-1,700.70-928.60

Finding the Fourth Proportional to 1,135.15, 1,700.70 and 928.60

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Solution

The fourth proportional to 1,135.15, 1,700.70 and 928.60 is: 1,391.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.15 : 1,700.70 = 928.60 : x
  2. Step 2: Convert to fraction form
    1,135.15/1,700.70 = 928.60/x
  3. Step 3: Cross multiply
    1,135.15x = 1,700.70 × 928.60
  4. Step 4: Simplify right side
    1,135.15x = 1,579,270.02
  5. Step 5: Solve for x
    x = 1,579,270.02/1,135.15
  6. Step 6: Final answer
    x = 1,391.24

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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.