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Finding the Fourth Proportional to 1,869.52, 2,804.44 and 637.78

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Solution

The fourth proportional to 1,869.52, 2,804.44 and 637.78 is: 956.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.52 : 2,804.44 = 637.78 : x
  2. Step 2: Convert to fraction form
    1,869.52/2,804.44 = 637.78/x
  3. Step 3: Cross multiply
    1,869.52x = 2,804.44 × 637.78
  4. Step 4: Simplify right side
    1,869.52x = 1,788,615.74
  5. Step 5: Solve for x
    x = 1,788,615.74/1,869.52
  6. Step 6: Final answer
    x = 956.72

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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.