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Finding the Fourth Proportional to 2,178.40, 3,285.64 and 2,034.40

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Solution

The fourth proportional to 2,178.40, 3,285.64 and 2,034.40 is: 3,068.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.40 : 3,285.64 = 2,034.40 : x
  2. Step 2: Convert to fraction form
    2,178.40/3,285.64 = 2,034.40/x
  3. Step 3: Cross multiply
    2,178.40x = 3,285.64 × 2,034.40
  4. Step 4: Simplify right side
    2,178.40x = 6,684,306.02
  5. Step 5: Solve for x
    x = 6,684,306.02/2,178.40
  6. Step 6: Final answer
    x = 3,068.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.