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Finding the Fourth Proportional to 2,622.95, 3,931.65 and 867.50

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Solution

The fourth proportional to 2,622.95, 3,931.65 and 867.50 is: 1,300.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,622.95 : 3,931.65 = 867.50 : x
  2. Step 2: Convert to fraction form
    2,622.95/3,931.65 = 867.50/x
  3. Step 3: Cross multiply
    2,622.95x = 3,931.65 × 867.50
  4. Step 4: Simplify right side
    2,622.95x = 3,410,713.74
  5. Step 5: Solve for x
    x = 3,410,713.74/2,622.95
  6. Step 6: Final answer
    x = 1,300.34

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1.5x scale

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.