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Finding the Fourth Proportional to 531.04, 792.83 and 427.92

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Solution

The fourth proportional to 531.04, 792.83 and 427.92 is: 638.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.04 : 792.83 = 427.92 : x
  2. Step 2: Convert to fraction form
    531.04/792.83 = 427.92/x
  3. Step 3: Cross multiply
    531.04x = 792.83 × 427.92
  4. Step 4: Simplify right side
    531.04x = 339,267.81
  5. Step 5: Solve for x
    x = 339,267.81/531.04
  6. Step 6: Final answer
    x = 638.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.