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Finding the Fourth Proportional to 1,366.90, 2,051.07 and 790.18

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Solution

The fourth proportional to 1,366.90, 2,051.07 and 790.18 is: 1,185.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.90 : 2,051.07 = 790.18 : x
  2. Step 2: Convert to fraction form
    1,366.90/2,051.07 = 790.18/x
  3. Step 3: Cross multiply
    1,366.90x = 2,051.07 × 790.18
  4. Step 4: Simplify right side
    1,366.90x = 1,620,714.49
  5. Step 5: Solve for x
    x = 1,620,714.49/1,366.90
  6. Step 6: Final answer
    x = 1,185.69

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1.5x scale

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.