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Finding the Fourth Proportional to 1,646.64, 2,470.41 and 492.39

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Solution

The fourth proportional to 1,646.64, 2,470.41 and 492.39 is: 738.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.64 : 2,470.41 = 492.39 : x
  2. Step 2: Convert to fraction form
    1,646.64/2,470.41 = 492.39/x
  3. Step 3: Cross multiply
    1,646.64x = 2,470.41 × 492.39
  4. Step 4: Simplify right side
    1,646.64x = 1,216,405.18
  5. Step 5: Solve for x
    x = 1,216,405.18/1,646.64
  6. Step 6: Final answer
    x = 738.72

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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.