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Finding the Fourth Proportional to 2,178.79, 3,267.71 and 618.76

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Solution

The fourth proportional to 2,178.79, 3,267.71 and 618.76 is: 928.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.79 : 3,267.71 = 618.76 : x
  2. Step 2: Convert to fraction form
    2,178.79/3,267.71 = 618.76/x
  3. Step 3: Cross multiply
    2,178.79x = 3,267.71 × 618.76
  4. Step 4: Simplify right side
    2,178.79x = 2,021,928.24
  5. Step 5: Solve for x
    x = 2,021,928.24/2,178.79
  6. Step 6: Final answer
    x = 928.01

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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.