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Finding the Fourth Proportional to 1,482.15, 2,045.36 and 819.05

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Solution

The fourth proportional to 1,482.15, 2,045.36 and 819.05 is: 1,130.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,482.15 : 2,045.36 = 819.05 : x
  2. Step 2: Convert to fraction form
    1,482.15/2,045.36 = 819.05/x
  3. Step 3: Cross multiply
    1,482.15x = 2,045.36 × 819.05
  4. Step 4: Simplify right side
    1,482.15x = 1,675,237.79
  5. Step 5: Solve for x
    x = 1,675,237.79/1,482.15
  6. Step 6: Final answer
    x = 1,130.28

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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.