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Finding the Fourth Proportional to 764.51, 1,055.49 and 555.37

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Solution

The fourth proportional to 764.51, 1,055.49 and 555.37 is: 766.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.51 : 1,055.49 = 555.37 : x
  2. Step 2: Convert to fraction form
    764.51/1,055.49 = 555.37/x
  3. Step 3: Cross multiply
    764.51x = 1,055.49 × 555.37
  4. Step 4: Simplify right side
    764.51x = 586,182.20
  5. Step 5: Solve for x
    x = 586,182.20/764.51
  6. Step 6: Final answer
    x = 766.74

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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.