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Finding the Fourth Proportional to 1,455.09, 2,007.91 and 825.47

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Solution

The fourth proportional to 1,455.09, 2,007.91 and 825.47 is: 1,139.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.09 : 2,007.91 = 825.47 : x
  2. Step 2: Convert to fraction form
    1,455.09/2,007.91 = 825.47/x
  3. Step 3: Cross multiply
    1,455.09x = 2,007.91 × 825.47
  4. Step 4: Simplify right side
    1,455.09x = 1,657,457.70
  5. Step 5: Solve for x
    x = 1,657,457.70/1,455.09
  6. Step 6: Final answer
    x = 1,139.08

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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.