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Finding the Fourth Proportional to 630, 940.68 and 538.74

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Solution

The fourth proportional to 630, 940.68 and 538.74 is: 804.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    630 : 940.68 = 538.74 : x
  2. Step 2: Convert to fraction form
    630/940.68 = 538.74/x
  3. Step 3: Cross multiply
    630x = 940.68 × 538.74
  4. Step 4: Simplify right side
    630x = 506,781.94
  5. Step 5: Solve for x
    x = 506,781.94/630
  6. Step 6: Final answer
    x = 804.42

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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.