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Finding the Fourth Proportional to 1,292.42, 1,939.34 and 562

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Solution

The fourth proportional to 1,292.42, 1,939.34 and 562 is: 843.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.42 : 1,939.34 = 562 : x
  2. Step 2: Convert to fraction form
    1,292.42/1,939.34 = 562/x
  3. Step 3: Cross multiply
    1,292.42x = 1,939.34 × 562
  4. Step 4: Simplify right side
    1,292.42x = 1,089,909.08
  5. Step 5: Solve for x
    x = 1,089,909.08/1,292.42
  6. Step 6: Final answer
    x = 843.31

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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.