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Finding the Fourth Proportional to 1,400.75, 2,100.65 and 523.07

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Solution

The fourth proportional to 1,400.75, 2,100.65 and 523.07 is: 784.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.75 : 2,100.65 = 523.07 : x
  2. Step 2: Convert to fraction form
    1,400.75/2,100.65 = 523.07/x
  3. Step 3: Cross multiply
    1,400.75x = 2,100.65 × 523.07
  4. Step 4: Simplify right side
    1,400.75x = 1,098,776.50
  5. Step 5: Solve for x
    x = 1,098,776.50/1,400.75
  6. Step 6: Final answer
    x = 784.42

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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.