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Finding the Fourth Proportional to 712.26, 983.16 and 417.78

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Solution

The fourth proportional to 712.26, 983.16 and 417.78 is: 576.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.26 : 983.16 = 417.78 : x
  2. Step 2: Convert to fraction form
    712.26/983.16 = 417.78/x
  3. Step 3: Cross multiply
    712.26x = 983.16 × 417.78
  4. Step 4: Simplify right side
    712.26x = 410,744.58
  5. Step 5: Solve for x
    x = 410,744.58/712.26
  6. Step 6: Final answer
    x = 576.68

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1.5x scale

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.