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Finding the Fourth Proportional to 762.11, 1,050.74 and 622.08

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Solution

The fourth proportional to 762.11, 1,050.74 and 622.08 is: 857.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.11 : 1,050.74 = 622.08 : x
  2. Step 2: Convert to fraction form
    762.11/1,050.74 = 622.08/x
  3. Step 3: Cross multiply
    762.11x = 1,050.74 × 622.08
  4. Step 4: Simplify right side
    762.11x = 653,641.23
  5. Step 5: Solve for x
    x = 653,641.23/762.11
  6. Step 6: Final answer
    x = 857.68

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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.