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Finding the Fourth Proportional to 1,081.80, 1,492.84 and 609.80

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Solution

The fourth proportional to 1,081.80, 1,492.84 and 609.80 is: 841.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.80 : 1,492.84 = 609.80 : x
  2. Step 2: Convert to fraction form
    1,081.80/1,492.84 = 609.80/x
  3. Step 3: Cross multiply
    1,081.80x = 1,492.84 × 609.80
  4. Step 4: Simplify right side
    1,081.80x = 910,333.83
  5. Step 5: Solve for x
    x = 910,333.83/1,081.80
  6. Step 6: Final answer
    x = 841.50

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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.