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Finding the Fourth Proportional to 826.07, 1,235.52 and 478.58

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Solution

The fourth proportional to 826.07, 1,235.52 and 478.58 is: 715.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.07 : 1,235.52 = 478.58 : x
  2. Step 2: Convert to fraction form
    826.07/1,235.52 = 478.58/x
  3. Step 3: Cross multiply
    826.07x = 1,235.52 × 478.58
  4. Step 4: Simplify right side
    826.07x = 591,288.98
  5. Step 5: Solve for x
    x = 591,288.98/826.07
  6. Step 6: Final answer
    x = 715.79

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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.