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Finding the Fourth Proportional to 1,855.81, 2,784.17 and 623.50

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Solution

The fourth proportional to 1,855.81, 2,784.17 and 623.50 is: 935.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855.81 : 2,784.17 = 623.50 : x
  2. Step 2: Convert to fraction form
    1,855.81/2,784.17 = 623.50/x
  3. Step 3: Cross multiply
    1,855.81x = 2,784.17 × 623.50
  4. Step 4: Simplify right side
    1,855.81x = 1,735,924.59
  5. Step 5: Solve for x
    x = 1,735,924.59/1,855.81
  6. Step 6: Final answer
    x = 935.40

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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.