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Finding the Fourth Proportional to 623.70, 939.24 and 543.51

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Solution

The fourth proportional to 623.70, 939.24 and 543.51 is: 818.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.70 : 939.24 = 543.51 : x
  2. Step 2: Convert to fraction form
    623.70/939.24 = 543.51/x
  3. Step 3: Cross multiply
    623.70x = 939.24 × 543.51
  4. Step 4: Simplify right side
    623.70x = 510,486.33
  5. Step 5: Solve for x
    x = 510,486.33/623.70
  6. Step 6: Final answer
    x = 818.48

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.