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Finding the Fourth Proportional to 520.97, 719.08 and 513.07

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Solution

The fourth proportional to 520.97, 719.08 and 513.07 is: 708.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.97 : 719.08 = 513.07 : x
  2. Step 2: Convert to fraction form
    520.97/719.08 = 513.07/x
  3. Step 3: Cross multiply
    520.97x = 719.08 × 513.07
  4. Step 4: Simplify right side
    520.97x = 368,935.30
  5. Step 5: Solve for x
    x = 368,935.30/520.97
  6. Step 6: Final answer
    x = 708.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.