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Finding the Fourth Proportional to 575.28, 858.96 and 520.56

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Solution

The fourth proportional to 575.28, 858.96 and 520.56 is: 777.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.28 : 858.96 = 520.56 : x
  2. Step 2: Convert to fraction form
    575.28/858.96 = 520.56/x
  3. Step 3: Cross multiply
    575.28x = 858.96 × 520.56
  4. Step 4: Simplify right side
    575.28x = 447,140.22
  5. Step 5: Solve for x
    x = 447,140.22/575.28
  6. Step 6: Final answer
    x = 777.26

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.