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Finding the Fourth Proportional to 704.95, 1,057.44 and 288.49

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Solution

The fourth proportional to 704.95, 1,057.44 and 288.49 is: 432.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.95 : 1,057.44 = 288.49 : x
  2. Step 2: Convert to fraction form
    704.95/1,057.44 = 288.49/x
  3. Step 3: Cross multiply
    704.95x = 1,057.44 × 288.49
  4. Step 4: Simplify right side
    704.95x = 305,060.87
  5. Step 5: Solve for x
    x = 305,060.87/704.95
  6. Step 6: Final answer
    x = 432.74

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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.