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Finding the Fourth Proportional to 1,055.26, 1,455.69 and 635.36

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Solution

The fourth proportional to 1,055.26, 1,455.69 and 635.36 is: 876.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.26 : 1,455.69 = 635.36 : x
  2. Step 2: Convert to fraction form
    1,055.26/1,455.69 = 635.36/x
  3. Step 3: Cross multiply
    1,055.26x = 1,455.69 × 635.36
  4. Step 4: Simplify right side
    1,055.26x = 924,884.02
  5. Step 5: Solve for x
    x = 924,884.02/1,055.26
  6. Step 6: Final answer
    x = 876.45

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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.