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Finding the Fourth Proportional to 701.45, 1,051.28 and 290.87

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Solution

The fourth proportional to 701.45, 1,051.28 and 290.87 is: 435.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.45 : 1,051.28 = 290.87 : x
  2. Step 2: Convert to fraction form
    701.45/1,051.28 = 290.87/x
  3. Step 3: Cross multiply
    701.45x = 1,051.28 × 290.87
  4. Step 4: Simplify right side
    701.45x = 305,784.36
  5. Step 5: Solve for x
    x = 305,784.36/701.45
  6. Step 6: Final answer
    x = 435.93

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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.