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Finding the Fourth Proportional to 1,051.98, 1,451.90 and 609.80

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Solution

The fourth proportional to 1,051.98, 1,451.90 and 609.80 is: 841.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.98 : 1,451.90 = 609.80 : x
  2. Step 2: Convert to fraction form
    1,051.98/1,451.90 = 609.80/x
  3. Step 3: Cross multiply
    1,051.98x = 1,451.90 × 609.80
  4. Step 4: Simplify right side
    1,051.98x = 885,362.88
  5. Step 5: Solve for x
    x = 885,362.88/1,051.98
  6. Step 6: Final answer
    x = 841.62

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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.