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Finding the Fourth Proportional to 520,004.75, 780,007.13 and 126,020.75

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Solution

The fourth proportional to 520,004.75, 780,007.13 and 126,020.75 is: 189,031.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,004.75 : 780,007.13 = 126,020.75 : x
  2. Step 2: Convert to fraction form
    520,004.75/780,007.13 = 126,020.75/x
  3. Step 3: Cross multiply
    520,004.75x = 780,007.13 × 126,020.75
  4. Step 4: Simplify right side
    520,004.75x = 98,297,082,897.84
  5. Step 5: Solve for x
    x = 98,297,082,897.84/520,004.75
  6. Step 6: Final answer
    x = 189,031.13

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1.5x scale

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.