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Finding the Fourth Proportional to 688.83, 948.15 and 623.22

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Solution

The fourth proportional to 688.83, 948.15 and 623.22 is: 857.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.83 : 948.15 = 623.22 : x
  2. Step 2: Convert to fraction form
    688.83/948.15 = 623.22/x
  3. Step 3: Cross multiply
    688.83x = 948.15 × 623.22
  4. Step 4: Simplify right side
    688.83x = 590,906.04
  5. Step 5: Solve for x
    x = 590,906.04/688.83
  6. Step 6: Final answer
    x = 857.84

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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.