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Finding the Fourth Proportional to 512,230.41, 706,220.80 and 420,009.90

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Solution

The fourth proportional to 512,230.41, 706,220.80 and 420,009.90 is: 579,074.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,230.41 : 706,220.80 = 420,009.90 : x
  2. Step 2: Convert to fraction form
    512,230.41/706,220.80 = 420,009.90/x
  3. Step 3: Cross multiply
    512,230.41x = 706,220.80 × 420,009.90
  4. Step 4: Simplify right side
    512,230.41x = 296,619,727,585.92
  5. Step 5: Solve for x
    x = 296,619,727,585.92/512,230.41
  6. Step 6: Final answer
    x = 579,074.81

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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.