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Finding the Fourth Proportional to 538,396.40, 742,956.36 and 308,905.04

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Solution

The fourth proportional to 538,396.40, 742,956.36 and 308,905.04 is: 426,271.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,396.40 : 742,956.36 = 308,905.04 : x
  2. Step 2: Convert to fraction form
    538,396.40/742,956.36 = 308,905.04/x
  3. Step 3: Cross multiply
    538,396.40x = 742,956.36 × 308,905.04
  4. Step 4: Simplify right side
    538,396.40x = 229,502,964,104.05
  5. Step 5: Solve for x
    x = 229,502,964,104.05/538,396.40
  6. Step 6: Final answer
    x = 426,271.36

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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.