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Finding the Fourth Proportional to 525,679.93, 788,519.81 and 126,320.70

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Solution

The fourth proportional to 525,679.93, 788,519.81 and 126,320.70 is: 189,481.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,679.93 : 788,519.81 = 126,320.70 : x
  2. Step 2: Convert to fraction form
    525,679.93/788,519.81 = 126,320.70/x
  3. Step 3: Cross multiply
    525,679.93x = 788,519.81 × 126,320.70
  4. Step 4: Simplify right side
    525,679.93x = 99,606,373,731.46
  5. Step 5: Solve for x
    x = 99,606,373,731.46/525,679.93
  6. Step 6: Final answer
    x = 189,481.03

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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.