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Finding the Fourth Proportional to 701.58, 1,051.62 and 290.70

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Solution

The fourth proportional to 701.58, 1,051.62 and 290.70 is: 435.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.58 : 1,051.62 = 290.70 : x
  2. Step 2: Convert to fraction form
    701.58/1,051.62 = 290.70/x
  3. Step 3: Cross multiply
    701.58x = 1,051.62 × 290.70
  4. Step 4: Simplify right side
    701.58x = 305,705.93
  5. Step 5: Solve for x
    x = 305,705.93/701.58
  6. Step 6: Final answer
    x = 435.74

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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.