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Finding the Fourth Proportional to 520,488, 780,732 and 126,504

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Solution

The fourth proportional to 520,488, 780,732 and 126,504 is: 189,756

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,488 : 780,732 = 126,504 : x
  2. Step 2: Convert to fraction form
    520,488/780,732 = 126,504/x
  3. Step 3: Cross multiply
    520,488x = 780,732 × 126,504
  4. Step 4: Simplify right side
    520,488x = 98,765,720,928
  5. Step 5: Solve for x
    x = 98,765,720,928/520,488
  6. Step 6: Final answer
    x = 189,756

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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.