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Finding the Fourth Proportional to 538,123.20, 805,629.60 and 328,171.20

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Solution

The fourth proportional to 538,123.20, 805,629.60 and 328,171.20 is: 491,308.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,123.20 : 805,629.60 = 328,171.20 : x
  2. Step 2: Convert to fraction form
    538,123.20/805,629.60 = 328,171.20/x
  3. Step 3: Cross multiply
    538,123.20x = 805,629.60 × 328,171.20
  4. Step 4: Simplify right side
    538,123.20x = 264,384,432,587.52
  5. Step 5: Solve for x
    x = 264,384,432,587.52/538,123.20
  6. Step 6: Final answer
    x = 491,308.37

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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.