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Finding the Fourth Proportional to 520,614, 780,922.08 and 126,630

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Solution

The fourth proportional to 520,614, 780,922.08 and 126,630 is: 189,945.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,614 : 780,922.08 = 126,630 : x
  2. Step 2: Convert to fraction form
    520,614/780,922.08 = 126,630/x
  3. Step 3: Cross multiply
    520,614x = 780,922.08 × 126,630
  4. Step 4: Simplify right side
    520,614x = 98,888,162,990.40
  5. Step 5: Solve for x
    x = 98,888,162,990.40/520,614
  6. Step 6: Final answer
    x = 189,945.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.