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Finding the Fourth Proportional to 554,057.21, 764,588.57 and 312,339.95

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Solution

The fourth proportional to 554,057.21, 764,588.57 and 312,339.95 is: 431,023.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,057.21 : 764,588.57 = 312,339.95 : x
  2. Step 2: Convert to fraction form
    554,057.21/764,588.57 = 312,339.95/x
  3. Step 3: Cross multiply
    554,057.21x = 764,588.57 × 312,339.95
  4. Step 4: Simplify right side
    554,057.21x = 238,811,553,206.94
  5. Step 5: Solve for x
    x = 238,811,553,206.94/554,057.21
  6. Step 6: Final answer
    x = 431,023.27

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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.