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Finding the Fourth Proportional to 631,399.91, 871,332.66 and 359,467.80

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Solution

The fourth proportional to 631,399.91, 871,332.66 and 359,467.80 is: 496,066.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,399.91 : 871,332.66 = 359,467.80 : x
  2. Step 2: Convert to fraction form
    631,399.91/871,332.66 = 359,467.80/x
  3. Step 3: Cross multiply
    631,399.91x = 871,332.66 × 359,467.80
  4. Step 4: Simplify right side
    631,399.91x = 313,216,030,001.69
  5. Step 5: Solve for x
    x = 313,216,030,001.69/631,399.91
  6. Step 6: Final answer
    x = 496,066.00

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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.