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Finding the Fourth Proportional to 272,920.81, 407,462.20 and 208,542.03

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Solution

The fourth proportional to 272,920.81, 407,462.20 and 208,542.03 is: 311,346.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,920.81 : 407,462.20 = 208,542.03 : x
  2. Step 2: Convert to fraction form
    272,920.81/407,462.20 = 208,542.03/x
  3. Step 3: Cross multiply
    272,920.81x = 407,462.20 × 208,542.03
  4. Step 4: Simplify right side
    272,920.81x = 84,972,994,336.27
  5. Step 5: Solve for x
    x = 84,972,994,336.27/272,920.81
  6. Step 6: Final answer
    x = 311,346.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.