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Finding the Fourth Proportional to 1,252.42, 1,878.80 and 472.39

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Solution

The fourth proportional to 1,252.42, 1,878.80 and 472.39 is: 708.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.42 : 1,878.80 = 472.39 : x
  2. Step 2: Convert to fraction form
    1,252.42/1,878.80 = 472.39/x
  3. Step 3: Cross multiply
    1,252.42x = 1,878.80 × 472.39
  4. Step 4: Simplify right side
    1,252.42x = 887,526.33
  5. Step 5: Solve for x
    x = 887,526.33/1,252.42
  6. Step 6: Final answer
    x = 708.65

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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.