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Finding the Fourth Proportional to 525.02, 786.72 and 387.86

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Solution

The fourth proportional to 525.02, 786.72 and 387.86 is: 581.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.02 : 786.72 = 387.86 : x
  2. Step 2: Convert to fraction form
    525.02/786.72 = 387.86/x
  3. Step 3: Cross multiply
    525.02x = 786.72 × 387.86
  4. Step 4: Simplify right side
    525.02x = 305,137.22
  5. Step 5: Solve for x
    x = 305,137.22/525.02
  6. Step 6: Final answer
    x = 581.19

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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.