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Finding the Fourth Proportional to 673.76, 930.48 and 518.24

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Solution

The fourth proportional to 673.76, 930.48 and 518.24 is: 715.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.76 : 930.48 = 518.24 : x
  2. Step 2: Convert to fraction form
    673.76/930.48 = 518.24/x
  3. Step 3: Cross multiply
    673.76x = 930.48 × 518.24
  4. Step 4: Simplify right side
    673.76x = 482,211.96
  5. Step 5: Solve for x
    x = 482,211.96/673.76
  6. Step 6: Final answer
    x = 715.70

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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.