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Finding the Fourth Proportional to 1,412.39, 2,118.59 and 546.50

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Solution

The fourth proportional to 1,412.39, 2,118.59 and 546.50 is: 819.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.39 : 2,118.59 = 546.50 : x
  2. Step 2: Convert to fraction form
    1,412.39/2,118.59 = 546.50/x
  3. Step 3: Cross multiply
    1,412.39x = 2,118.59 × 546.50
  4. Step 4: Simplify right side
    1,412.39x = 1,157,809.44
  5. Step 5: Solve for x
    x = 1,157,809.44/1,412.39
  6. Step 6: Final answer
    x = 819.75

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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.