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Finding the Fourth Proportional to 817,956, 1,128,688.56 and 455,296.32

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Solution

The fourth proportional to 817,956, 1,128,688.56 and 455,296.32 is: 628,258.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,956 : 1,128,688.56 = 455,296.32 : x
  2. Step 2: Convert to fraction form
    817,956/1,128,688.56 = 455,296.32/x
  3. Step 3: Cross multiply
    817,956x = 1,128,688.56 × 455,296.32
  4. Step 4: Simplify right side
    817,956x = 513,887,747,794.10
  5. Step 5: Solve for x
    x = 513,887,747,794.10/817,956
  6. Step 6: Final answer
    x = 628,258.42

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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.