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Finding the Fourth Proportional to 764.40, 1,055.04 and 502.44

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Solution

The fourth proportional to 764.40, 1,055.04 and 502.44 is: 693.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.40 : 1,055.04 = 502.44 : x
  2. Step 2: Convert to fraction form
    764.40/1,055.04 = 502.44/x
  3. Step 3: Cross multiply
    764.40x = 1,055.04 × 502.44
  4. Step 4: Simplify right side
    764.40x = 530,094.30
  5. Step 5: Solve for x
    x = 530,094.30/764.40
  6. Step 6: Final answer
    x = 693.48

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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.