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Finding the Fourth Proportional to 631,778.50, 871,852.71 and 345,300.54

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Solution

The fourth proportional to 631,778.50, 871,852.71 and 345,300.54 is: 476,513.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,778.50 : 871,852.71 = 345,300.54 : x
  2. Step 2: Convert to fraction form
    631,778.50/871,852.71 = 345,300.54/x
  3. Step 3: Cross multiply
    631,778.50x = 871,852.71 × 345,300.54
  4. Step 4: Simplify right side
    631,778.50x = 301,051,211,563.46
  5. Step 5: Solve for x
    x = 301,051,211,563.46/631,778.50
  6. Step 6: Final answer
    x = 476,513.86

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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.