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Finding the Fourth Proportional to 798.30, 1,102.50 and 623.39

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Solution

The fourth proportional to 798.30, 1,102.50 and 623.39 is: 860.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.30 : 1,102.50 = 623.39 : x
  2. Step 2: Convert to fraction form
    798.30/1,102.50 = 623.39/x
  3. Step 3: Cross multiply
    798.30x = 1,102.50 × 623.39
  4. Step 4: Simplify right side
    798.30x = 687,281.96
  5. Step 5: Solve for x
    x = 687,281.96/798.30
  6. Step 6: Final answer
    x = 860.93

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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.