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Finding the Fourth Proportional to 1,070.43, 1,605.42 and 300.75

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Solution

The fourth proportional to 1,070.43, 1,605.42 and 300.75 is: 451.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.43 : 1,605.42 = 300.75 : x
  2. Step 2: Convert to fraction form
    1,070.43/1,605.42 = 300.75/x
  3. Step 3: Cross multiply
    1,070.43x = 1,605.42 × 300.75
  4. Step 4: Simplify right side
    1,070.43x = 482,830.07
  5. Step 5: Solve for x
    x = 482,830.07/1,070.43
  6. Step 6: Final answer
    x = 451.06

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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.