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Finding the Fourth Proportional to 565,435.34, 780,290.70 and 310,786.46

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Solution

The fourth proportional to 565,435.34, 780,290.70 and 310,786.46 is: 428,879.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,435.34 : 780,290.70 = 310,786.46 : x
  2. Step 2: Convert to fraction form
    565,435.34/780,290.70 = 310,786.46/x
  3. Step 3: Cross multiply
    565,435.34x = 780,290.70 × 310,786.46
  4. Step 4: Simplify right side
    565,435.34x = 242,503,784,423.92
  5. Step 5: Solve for x
    x = 242,503,784,423.92/565,435.34
  6. Step 6: Final answer
    x = 428,879.78

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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.