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Finding the Fourth Proportional to 42,888.70, 64,404.33 and 28,938.49

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Solution

The fourth proportional to 42,888.70, 64,404.33 and 28,938.49 is: 43,455.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,888.70 : 64,404.33 = 28,938.49 : x
  2. Step 2: Convert to fraction form
    42,888.70/64,404.33 = 28,938.49/x
  3. Step 3: Cross multiply
    42,888.70x = 64,404.33 × 28,938.49
  4. Step 4: Simplify right side
    42,888.70x = 1,863,764,059.66
  5. Step 5: Solve for x
    x = 1,863,764,059.66/42,888.70
  6. Step 6: Final answer
    x = 43,455.83

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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.