Home / 1,285.93-1,926.78-1,155.16

Finding the Fourth Proportional to 1,285.93, 1,926.78 and 1,155.16

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Solution

The fourth proportional to 1,285.93, 1,926.78 and 1,155.16 is: 1,730.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.93 : 1,926.78 = 1,155.16 : x
  2. Step 2: Convert to fraction form
    1,285.93/1,926.78 = 1,155.16/x
  3. Step 3: Cross multiply
    1,285.93x = 1,926.78 × 1,155.16
  4. Step 4: Simplify right side
    1,285.93x = 2,225,739.18
  5. Step 5: Solve for x
    x = 2,225,739.18/1,285.93
  6. Step 6: Final answer
    x = 1,730.84

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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.