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Finding the Fourth Proportional to 2,051.74, 3,075.76 and 818.88

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Solution

The fourth proportional to 2,051.74, 3,075.76 and 818.88 is: 1,227.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,051.74 : 3,075.76 = 818.88 : x
  2. Step 2: Convert to fraction form
    2,051.74/3,075.76 = 818.88/x
  3. Step 3: Cross multiply
    2,051.74x = 3,075.76 × 818.88
  4. Step 4: Simplify right side
    2,051.74x = 2,518,678.35
  5. Step 5: Solve for x
    x = 2,518,678.35/2,051.74
  6. Step 6: Final answer
    x = 1,227.58

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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.