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Finding the Fourth Proportional to 538,158.60, 742,662.64 and 308,725.90

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Solution

The fourth proportional to 538,158.60, 742,662.64 and 308,725.90 is: 426,043.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,158.60 : 742,662.64 = 308,725.90 : x
  2. Step 2: Convert to fraction form
    538,158.60/742,662.64 = 308,725.90/x
  3. Step 3: Cross multiply
    538,158.60x = 742,662.64 × 308,725.90
  4. Step 4: Simplify right side
    538,158.60x = 229,279,191,930.38
  5. Step 5: Solve for x
    x = 229,279,191,930.38/538,158.60
  6. Step 6: Final answer
    x = 426,043.91

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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.