Home / 722,101.20-996,530.80-399,811.28

Finding the Fourth Proportional to 722,101.20, 996,530.80 and 399,811.28

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Solution

The fourth proportional to 722,101.20, 996,530.80 and 399,811.28 is: 551,756.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,101.20 : 996,530.80 = 399,811.28 : x
  2. Step 2: Convert to fraction form
    722,101.20/996,530.80 = 399,811.28/x
  3. Step 3: Cross multiply
    722,101.20x = 996,530.80 × 399,811.28
  4. Step 4: Simplify right side
    722,101.20x = 398,424,254,707.42
  5. Step 5: Solve for x
    x = 398,424,254,707.42/722,101.20
  6. Step 6: Final answer
    x = 551,756.81

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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.