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Finding the Fourth Proportional to 520.06, 780 and 173.36

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Solution

The fourth proportional to 520.06, 780 and 173.36 is: 260.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.06 : 780 = 173.36 : x
  2. Step 2: Convert to fraction form
    520.06/780 = 173.36/x
  3. Step 3: Cross multiply
    520.06x = 780 × 173.36
  4. Step 4: Simplify right side
    520.06x = 135,220.80
  5. Step 5: Solve for x
    x = 135,220.80/520.06
  6. Step 6: Final answer
    x = 260.01

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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.