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Finding the Fourth Proportional to 1,345.44, 1,855.78 and 1,235.28

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Solution

The fourth proportional to 1,345.44, 1,855.78 and 1,235.28 is: 1,703.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.44 : 1,855.78 = 1,235.28 : x
  2. Step 2: Convert to fraction form
    1,345.44/1,855.78 = 1,235.28/x
  3. Step 3: Cross multiply
    1,345.44x = 1,855.78 × 1,235.28
  4. Step 4: Simplify right side
    1,345.44x = 2,292,407.92
  5. Step 5: Solve for x
    x = 2,292,407.92/1,345.44
  6. Step 6: Final answer
    x = 1,703.84

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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.