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Finding the Fourth Proportional to 629.76, 875.08 and 623.01

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Solution

The fourth proportional to 629.76, 875.08 and 623.01 is: 865.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.76 : 875.08 = 623.01 : x
  2. Step 2: Convert to fraction form
    629.76/875.08 = 623.01/x
  3. Step 3: Cross multiply
    629.76x = 875.08 × 623.01
  4. Step 4: Simplify right side
    629.76x = 545,182.03
  5. Step 5: Solve for x
    x = 545,182.03/629.76
  6. Step 6: Final answer
    x = 865.70

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.