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Finding the Fourth Proportional to 631,023.76, 871,734 and 545,993.20

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Solution

The fourth proportional to 631,023.76, 871,734 and 545,993.20 is: 754,267.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,023.76 : 871,734 = 545,993.20 : x
  2. Step 2: Convert to fraction form
    631,023.76/871,734 = 545,993.20/x
  3. Step 3: Cross multiply
    631,023.76x = 871,734 × 545,993.20
  4. Step 4: Simplify right side
    631,023.76x = 475,960,836,208.80
  5. Step 5: Solve for x
    x = 475,960,836,208.80/631,023.76
  6. Step 6: Final answer
    x = 754,267.69

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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.