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Finding the Fourth Proportional to 1,045.05, 1,438.88 and 887.37

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Solution

The fourth proportional to 1,045.05, 1,438.88 and 887.37 is: 1,221.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.05 : 1,438.88 = 887.37 : x
  2. Step 2: Convert to fraction form
    1,045.05/1,438.88 = 887.37/x
  3. Step 3: Cross multiply
    1,045.05x = 1,438.88 × 887.37
  4. Step 4: Simplify right side
    1,045.05x = 1,276,814.51
  5. Step 5: Solve for x
    x = 1,276,814.51/1,045.05
  6. Step 6: Final answer
    x = 1,221.77

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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.