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Finding the Fourth Proportional to 538,160.72, 742,665.58 and 308,728.01

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Solution

The fourth proportional to 538,160.72, 742,665.58 and 308,728.01 is: 426,046.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,160.72 : 742,665.58 = 308,728.01 : x
  2. Step 2: Convert to fraction form
    538,160.72/742,665.58 = 308,728.01/x
  3. Step 3: Cross multiply
    538,160.72x = 742,665.58 × 308,728.01
  4. Step 4: Simplify right side
    538,160.72x = 229,281,667,693.74
  5. Step 5: Solve for x
    x = 229,281,667,693.74/538,160.72
  6. Step 6: Final answer
    x = 426,046.83

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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.