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Finding the Fourth Proportional to 4,921.76, 7,382.64 and 1,458.76

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Solution

The fourth proportional to 4,921.76, 7,382.64 and 1,458.76 is: 2,188.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,921.76 : 7,382.64 = 1,458.76 : x
  2. Step 2: Convert to fraction form
    4,921.76/7,382.64 = 1,458.76/x
  3. Step 3: Cross multiply
    4,921.76x = 7,382.64 × 1,458.76
  4. Step 4: Simplify right side
    4,921.76x = 10,769,499.93
  5. Step 5: Solve for x
    x = 10,769,499.93/4,921.76
  6. Step 6: Final answer
    x = 2,188.14

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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.