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Finding the Fourth Proportional to 529.02, 792.18 and 420.48

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Solution

The fourth proportional to 529.02, 792.18 and 420.48 is: 629.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.02 : 792.18 = 420.48 : x
  2. Step 2: Convert to fraction form
    529.02/792.18 = 420.48/x
  3. Step 3: Cross multiply
    529.02x = 792.18 × 420.48
  4. Step 4: Simplify right side
    529.02x = 333,095.85
  5. Step 5: Solve for x
    x = 333,095.85/529.02
  6. Step 6: Final answer
    x = 629.65

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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.