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Finding the Fourth Proportional to 398,884.72, 550,462.68 and 217,600.72

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Solution

The fourth proportional to 398,884.72, 550,462.68 and 217,600.72 is: 300,289.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,884.72 : 550,462.68 = 217,600.72 : x
  2. Step 2: Convert to fraction form
    398,884.72/550,462.68 = 217,600.72/x
  3. Step 3: Cross multiply
    398,884.72x = 550,462.68 × 217,600.72
  4. Step 4: Simplify right side
    398,884.72x = 119,781,075,501.13
  5. Step 5: Solve for x
    x = 119,781,075,501.13/398,884.72
  6. Step 6: Final answer
    x = 300,289.96

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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.