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Finding the Fourth Proportional to 427,871.36, 640,861.03 and 292,614.89

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Solution

The fourth proportional to 427,871.36, 640,861.03 and 292,614.89 is: 438,275.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,871.36 : 640,861.03 = 292,614.89 : x
  2. Step 2: Convert to fraction form
    427,871.36/640,861.03 = 292,614.89/x
  3. Step 3: Cross multiply
    427,871.36x = 640,861.03 × 292,614.89
  4. Step 4: Simplify right side
    427,871.36x = 187,525,477,528.15
  5. Step 5: Solve for x
    x = 187,525,477,528.15/427,871.36
  6. Step 6: Final answer
    x = 438,275.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.