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Finding the Fourth Proportional to 1,281.56, 1,922.54 and 460.08

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Solution

The fourth proportional to 1,281.56, 1,922.54 and 460.08 is: 690.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.56 : 1,922.54 = 460.08 : x
  2. Step 2: Convert to fraction form
    1,281.56/1,922.54 = 460.08/x
  3. Step 3: Cross multiply
    1,281.56x = 1,922.54 × 460.08
  4. Step 4: Simplify right side
    1,281.56x = 884,519.90
  5. Step 5: Solve for x
    x = 884,519.90/1,281.56
  6. Step 6: Final answer
    x = 690.19

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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.