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Finding the Fourth Proportional to 1,281.42, 1,922.23 and 551.00

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Solution

The fourth proportional to 1,281.42, 1,922.23 and 551.00 is: 826.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.42 : 1,922.23 = 551.00 : x
  2. Step 2: Convert to fraction form
    1,281.42/1,922.23 = 551.00/x
  3. Step 3: Cross multiply
    1,281.42x = 1,922.23 × 551.00
  4. Step 4: Simplify right side
    1,281.42x = 1,059,154.22
  5. Step 5: Solve for x
    x = 1,059,154.22/1,281.42
  6. Step 6: Final answer
    x = 826.55

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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.