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Finding the Fourth Proportional to 1,855.48, 2,561.56 and 1,265

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Solution

The fourth proportional to 1,855.48, 2,561.56 and 1,265 is: 1,746.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855.48 : 2,561.56 = 1,265 : x
  2. Step 2: Convert to fraction form
    1,855.48/2,561.56 = 1,265/x
  3. Step 3: Cross multiply
    1,855.48x = 2,561.56 × 1,265
  4. Step 4: Simplify right side
    1,855.48x = 3,240,373.40
  5. Step 5: Solve for x
    x = 3,240,373.40/1,855.48
  6. Step 6: Final answer
    x = 1,746.38

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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.