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Finding the Fourth Proportional to 469,178.62, 648,004.58 and 308,749.87

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Solution

The fourth proportional to 469,178.62, 648,004.58 and 308,749.87 is: 426,428.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,178.62 : 648,004.58 = 308,749.87 : x
  2. Step 2: Convert to fraction form
    469,178.62/648,004.58 = 308,749.87/x
  3. Step 3: Cross multiply
    469,178.62x = 648,004.58 × 308,749.87
  4. Step 4: Simplify right side
    469,178.62x = 200,071,328,986.27
  5. Step 5: Solve for x
    x = 200,071,328,986.27/469,178.62
  6. Step 6: Final answer
    x = 426,428.92

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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.