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Finding the Fourth Proportional to 830.58, 1,246.08 and 739.90

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Solution

The fourth proportional to 830.58, 1,246.08 and 739.90 is: 1,110.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.58 : 1,246.08 = 739.90 : x
  2. Step 2: Convert to fraction form
    830.58/1,246.08 = 739.90/x
  3. Step 3: Cross multiply
    830.58x = 1,246.08 × 739.90
  4. Step 4: Simplify right side
    830.58x = 921,974.59
  5. Step 5: Solve for x
    x = 921,974.59/830.58
  6. Step 6: Final answer
    x = 1,110.04

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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.