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Finding the Fourth Proportional to 1,455.81, 2,184.08 and 415.83

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Solution

The fourth proportional to 1,455.81, 2,184.08 and 415.83 is: 623.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.81 : 2,184.08 = 415.83 : x
  2. Step 2: Convert to fraction form
    1,455.81/2,184.08 = 415.83/x
  3. Step 3: Cross multiply
    1,455.81x = 2,184.08 × 415.83
  4. Step 4: Simplify right side
    1,455.81x = 908,205.99
  5. Step 5: Solve for x
    x = 908,205.99/1,455.81
  6. Step 6: Final answer
    x = 623.85

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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.