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Finding the Fourth Proportional to 525,679.80, 788,519.62 and 126,320.57

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Solution

The fourth proportional to 525,679.80, 788,519.62 and 126,320.57 is: 189,480.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,679.80 : 788,519.62 = 126,320.57 : x
  2. Step 2: Convert to fraction form
    525,679.80/788,519.62 = 126,320.57/x
  3. Step 3: Cross multiply
    525,679.80x = 788,519.62 × 126,320.57
  4. Step 4: Simplify right side
    525,679.80x = 99,606,251,106.98
  5. Step 5: Solve for x
    x = 99,606,251,106.98/525,679.80
  6. Step 6: Final answer
    x = 189,480.84

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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.