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Finding the Fourth Proportional to 3,178.52, 4,768.10 and 870.04

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Solution

The fourth proportional to 3,178.52, 4,768.10 and 870.04 is: 1,305.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.52 : 4,768.10 = 870.04 : x
  2. Step 2: Convert to fraction form
    3,178.52/4,768.10 = 870.04/x
  3. Step 3: Cross multiply
    3,178.52x = 4,768.10 × 870.04
  4. Step 4: Simplify right side
    3,178.52x = 4,148,437.72
  5. Step 5: Solve for x
    x = 4,148,437.72/3,178.52
  6. Step 6: Final answer
    x = 1,305.15

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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.