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Finding the Fourth Proportional to 2,865.60, 3,955.14 and 1,687.50

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Solution

The fourth proportional to 2,865.60, 3,955.14 and 1,687.50 is: 2,329.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,865.60 : 3,955.14 = 1,687.50 : x
  2. Step 2: Convert to fraction form
    2,865.60/3,955.14 = 1,687.50/x
  3. Step 3: Cross multiply
    2,865.60x = 3,955.14 × 1,687.50
  4. Step 4: Simplify right side
    2,865.60x = 6,674,298.75
  5. Step 5: Solve for x
    x = 6,674,298.75/2,865.60
  6. Step 6: Final answer
    x = 2,329.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.