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Finding the Fourth Proportional to 1,415.44, 2,123.94 and 549.76

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Solution

The fourth proportional to 1,415.44, 2,123.94 and 549.76 is: 824.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.44 : 2,123.94 = 549.76 : x
  2. Step 2: Convert to fraction form
    1,415.44/2,123.94 = 549.76/x
  3. Step 3: Cross multiply
    1,415.44x = 2,123.94 × 549.76
  4. Step 4: Simplify right side
    1,415.44x = 1,167,657.25
  5. Step 5: Solve for x
    x = 1,167,657.25/1,415.44
  6. Step 6: Final answer
    x = 824.94

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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.