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Finding the Fourth Proportional to 767.58, 1,059.18 and 448.64

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Solution

The fourth proportional to 767.58, 1,059.18 and 448.64 is: 619.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.58 : 1,059.18 = 448.64 : x
  2. Step 2: Convert to fraction form
    767.58/1,059.18 = 448.64/x
  3. Step 3: Cross multiply
    767.58x = 1,059.18 × 448.64
  4. Step 4: Simplify right side
    767.58x = 475,187.51
  5. Step 5: Solve for x
    x = 475,187.51/767.58
  6. Step 6: Final answer
    x = 619.08

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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.