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Finding the Fourth Proportional to 630.19, 869.77 and 381.52

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Solution

The fourth proportional to 630.19, 869.77 and 381.52 is: 526.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.19 : 869.77 = 381.52 : x
  2. Step 2: Convert to fraction form
    630.19/869.77 = 381.52/x
  3. Step 3: Cross multiply
    630.19x = 869.77 × 381.52
  4. Step 4: Simplify right side
    630.19x = 331,834.65
  5. Step 5: Solve for x
    x = 331,834.65/630.19
  6. Step 6: Final answer
    x = 526.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.