Home / 631,135.89-871,042.26-355,502.81

Finding the Fourth Proportional to 631,135.89, 871,042.26 and 355,502.81

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Solution

The fourth proportional to 631,135.89, 871,042.26 and 355,502.81 is: 490,635.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,135.89 : 871,042.26 = 355,502.81 : x
  2. Step 2: Convert to fraction form
    631,135.89/871,042.26 = 355,502.81/x
  3. Step 3: Cross multiply
    631,135.89x = 871,042.26 × 355,502.81
  4. Step 4: Simplify right side
    631,135.89x = 309,657,971,058.75
  5. Step 5: Solve for x
    x = 309,657,971,058.75/631,135.89
  6. Step 6: Final answer
    x = 490,635.98

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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.