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Finding the Fourth Proportional to 513.40, 708.56 and 292.40

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Solution

The fourth proportional to 513.40, 708.56 and 292.40 is: 403.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.40 : 708.56 = 292.40 : x
  2. Step 2: Convert to fraction form
    513.40/708.56 = 292.40/x
  3. Step 3: Cross multiply
    513.40x = 708.56 × 292.40
  4. Step 4: Simplify right side
    513.40x = 207,182.94
  5. Step 5: Solve for x
    x = 207,182.94/513.40
  6. Step 6: Final answer
    x = 403.55

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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.