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Finding the Fourth Proportional to 520,171.80, 729,640.20 and 520,171.80

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Solution

The fourth proportional to 520,171.80, 729,640.20 and 520,171.80 is: 729,640.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,171.80 : 729,640.20 = 520,171.80 : x
  2. Step 2: Convert to fraction form
    520,171.80/729,640.20 = 520,171.80/x
  3. Step 3: Cross multiply
    520,171.80x = 729,640.20 × 520,171.80
  4. Step 4: Simplify right side
    520,171.80x = 379,538,256,186.36
  5. Step 5: Solve for x
    x = 379,538,256,186.36/520,171.80
  6. Step 6: Final answer
    x = 729,640.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.