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Finding the Fourth Proportional to 565,310.88, 780,124.08 and 307,185.12

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Solution

The fourth proportional to 565,310.88, 780,124.08 and 307,185.12 is: 423,912.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,310.88 : 780,124.08 = 307,185.12 : x
  2. Step 2: Convert to fraction form
    565,310.88/780,124.08 = 307,185.12/x
  3. Step 3: Cross multiply
    565,310.88x = 780,124.08 × 307,185.12
  4. Step 4: Simplify right side
    565,310.88x = 239,642,509,129.69
  5. Step 5: Solve for x
    x = 239,642,509,129.69/565,310.88
  6. Step 6: Final answer
    x = 423,912.78

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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.