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Finding the Fourth Proportional to 826.56, 1,238.76 and 619.52

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Solution

The fourth proportional to 826.56, 1,238.76 and 619.52 is: 928.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.56 : 1,238.76 = 619.52 : x
  2. Step 2: Convert to fraction form
    826.56/1,238.76 = 619.52/x
  3. Step 3: Cross multiply
    826.56x = 1,238.76 × 619.52
  4. Step 4: Simplify right side
    826.56x = 767,430.40
  5. Step 5: Solve for x
    x = 767,430.40/826.56
  6. Step 6: Final answer
    x = 928.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.