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Finding the Fourth Proportional to 1,856.50, 2,784.75 and 488.50

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Solution

The fourth proportional to 1,856.50, 2,784.75 and 488.50 is: 732.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,856.50 : 2,784.75 = 488.50 : x
  2. Step 2: Convert to fraction form
    1,856.50/2,784.75 = 488.50/x
  3. Step 3: Cross multiply
    1,856.50x = 2,784.75 × 488.50
  4. Step 4: Simplify right side
    1,856.50x = 1,360,350.38
  5. Step 5: Solve for x
    x = 1,360,350.38/1,856.50
  6. Step 6: Final answer
    x = 732.75

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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.