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Finding the Fourth Proportional to 1,645.60, 2,466.95 and 620.32

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Solution

The fourth proportional to 1,645.60, 2,466.95 and 620.32 is: 929.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.60 : 2,466.95 = 620.32 : x
  2. Step 2: Convert to fraction form
    1,645.60/2,466.95 = 620.32/x
  3. Step 3: Cross multiply
    1,645.60x = 2,466.95 × 620.32
  4. Step 4: Simplify right side
    1,645.60x = 1,530,298.42
  5. Step 5: Solve for x
    x = 1,530,298.42/1,645.60
  6. Step 6: Final answer
    x = 929.93

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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.