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Finding the Fourth Proportional to 764.29, 1,053.76 and 624.26

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Solution

The fourth proportional to 764.29, 1,053.76 and 624.26 is: 860.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.29 : 1,053.76 = 624.26 : x
  2. Step 2: Convert to fraction form
    764.29/1,053.76 = 624.26/x
  3. Step 3: Cross multiply
    764.29x = 1,053.76 × 624.26
  4. Step 4: Simplify right side
    764.29x = 657,820.22
  5. Step 5: Solve for x
    x = 657,820.22/764.29
  6. Step 6: Final answer
    x = 860.69

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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.