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Finding the Fourth Proportional to 515.88, 712.80 and 417.47

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Solution

The fourth proportional to 515.88, 712.80 and 417.47 is: 576.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.88 : 712.80 = 417.47 : x
  2. Step 2: Convert to fraction form
    515.88/712.80 = 417.47/x
  3. Step 3: Cross multiply
    515.88x = 712.80 × 417.47
  4. Step 4: Simplify right side
    515.88x = 297,569.05
  5. Step 5: Solve for x
    x = 297,569.05/515.88
  6. Step 6: Final answer
    x = 576.82

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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.