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Finding the Fourth Proportional to 553,579.40, 763,996.05 and 338,861.36

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Solution

The fourth proportional to 553,579.40, 763,996.05 and 338,861.36 is: 467,663.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,579.40 : 763,996.05 = 338,861.36 : x
  2. Step 2: Convert to fraction form
    553,579.40/763,996.05 = 338,861.36/x
  3. Step 3: Cross multiply
    553,579.40x = 763,996.05 × 338,861.36
  4. Step 4: Simplify right side
    553,579.40x = 258,888,742,447.62
  5. Step 5: Solve for x
    x = 258,888,742,447.62/553,579.40
  6. Step 6: Final answer
    x = 467,663.25

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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.