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Finding the Fourth Proportional to 553,819.63, 764,293.59 and 312,112.39

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Solution

The fourth proportional to 553,819.63, 764,293.59 and 312,112.39 is: 430,727.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,819.63 : 764,293.59 = 312,112.39 : x
  2. Step 2: Convert to fraction form
    553,819.63/764,293.59 = 312,112.39/x
  3. Step 3: Cross multiply
    553,819.63x = 764,293.59 × 312,112.39
  4. Step 4: Simplify right side
    553,819.63x = 238,545,499,036.58
  5. Step 5: Solve for x
    x = 238,545,499,036.58/553,819.63
  6. Step 6: Final answer
    x = 430,727.78

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1.5x scale

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.