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Finding the Fourth Proportional to 631,726.54, 871,783.10 and 345,246.66

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Solution

The fourth proportional to 631,726.54, 871,783.10 and 345,246.66 is: 476,440.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,726.54 : 871,783.10 = 345,246.66 : x
  2. Step 2: Convert to fraction form
    631,726.54/871,783.10 = 345,246.66/x
  3. Step 3: Cross multiply
    631,726.54x = 871,783.10 × 345,246.66
  4. Step 4: Simplify right side
    631,726.54x = 300,980,203,519.45
  5. Step 5: Solve for x
    x = 300,980,203,519.45/631,726.54
  6. Step 6: Final answer
    x = 476,440.65

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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.