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Finding the Fourth Proportional to 577.82, 865.78 and 423.81

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Solution

The fourth proportional to 577.82, 865.78 and 423.81 is: 635.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.82 : 865.78 = 423.81 : x
  2. Step 2: Convert to fraction form
    577.82/865.78 = 423.81/x
  3. Step 3: Cross multiply
    577.82x = 865.78 × 423.81
  4. Step 4: Simplify right side
    577.82x = 366,925.16
  5. Step 5: Solve for x
    x = 366,925.16/577.82
  6. Step 6: Final answer
    x = 635.01

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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.