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Finding the Fourth Proportional to 1,155.92, 1,730.64 and 1,065.20

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Solution

The fourth proportional to 1,155.92, 1,730.64 and 1,065.20 is: 1,594.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.92 : 1,730.64 = 1,065.20 : x
  2. Step 2: Convert to fraction form
    1,155.92/1,730.64 = 1,065.20/x
  3. Step 3: Cross multiply
    1,155.92x = 1,730.64 × 1,065.20
  4. Step 4: Simplify right side
    1,155.92x = 1,843,477.73
  5. Step 5: Solve for x
    x = 1,843,477.73/1,155.92
  6. Step 6: Final answer
    x = 1,594.81

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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.