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Finding the Fourth Proportional to 4,870.64, 7,305.96 and 2,680.40

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Solution

The fourth proportional to 4,870.64, 7,305.96 and 2,680.40 is: 4,020.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,870.64 : 7,305.96 = 2,680.40 : x
  2. Step 2: Convert to fraction form
    4,870.64/7,305.96 = 2,680.40/x
  3. Step 3: Cross multiply
    4,870.64x = 7,305.96 × 2,680.40
  4. Step 4: Simplify right side
    4,870.64x = 19,582,895.18
  5. Step 5: Solve for x
    x = 19,582,895.18/4,870.64
  6. Step 6: Final answer
    x = 4,020.60

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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.