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Finding the Fourth Proportional to 1,415.96, 2,123.96 and 442.04

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Solution

The fourth proportional to 1,415.96, 2,123.96 and 442.04 is: 663.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.96 : 2,123.96 = 442.04 : x
  2. Step 2: Convert to fraction form
    1,415.96/2,123.96 = 442.04/x
  3. Step 3: Cross multiply
    1,415.96x = 2,123.96 × 442.04
  4. Step 4: Simplify right side
    1,415.96x = 938,875.28
  5. Step 5: Solve for x
    x = 938,875.28/1,415.96
  6. Step 6: Final answer
    x = 663.07

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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.