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Finding the Fourth Proportional to 862,101.28, 1,189,736.64 and 480,128

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Solution

The fourth proportional to 862,101.28, 1,189,736.64 and 480,128 is: 662,597.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,101.28 : 1,189,736.64 = 480,128 : x
  2. Step 2: Convert to fraction form
    862,101.28/1,189,736.64 = 480,128/x
  3. Step 3: Cross multiply
    862,101.28x = 1,189,736.64 × 480,128
  4. Step 4: Simplify right side
    862,101.28x = 571,225,873,489.92
  5. Step 5: Solve for x
    x = 571,225,873,489.92/862,101.28
  6. Step 6: Final answer
    x = 662,597.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.