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Finding the Fourth Proportional to 764.22, 1,054.29 and 543.30

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Solution

The fourth proportional to 764.22, 1,054.29 and 543.30 is: 749.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.22 : 1,054.29 = 543.30 : x
  2. Step 2: Convert to fraction form
    764.22/1,054.29 = 543.30/x
  3. Step 3: Cross multiply
    764.22x = 1,054.29 × 543.30
  4. Step 4: Simplify right side
    764.22x = 572,795.76
  5. Step 5: Solve for x
    x = 572,795.76/764.22
  6. Step 6: Final answer
    x = 749.52

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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.