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Finding the Fourth Proportional to 718.04, 1,078.32 and 620.84

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Solution

The fourth proportional to 718.04, 1,078.32 and 620.84 is: 932.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.04 : 1,078.32 = 620.84 : x
  2. Step 2: Convert to fraction form
    718.04/1,078.32 = 620.84/x
  3. Step 3: Cross multiply
    718.04x = 1,078.32 × 620.84
  4. Step 4: Simplify right side
    718.04x = 669,464.19
  5. Step 5: Solve for x
    x = 669,464.19/718.04
  6. Step 6: Final answer
    x = 932.35

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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.