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Finding the Fourth Proportional to 691.79, 954.95 and 443.43

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Solution

The fourth proportional to 691.79, 954.95 and 443.43 is: 612.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.79 : 954.95 = 443.43 : x
  2. Step 2: Convert to fraction form
    691.79/954.95 = 443.43/x
  3. Step 3: Cross multiply
    691.79x = 954.95 × 443.43
  4. Step 4: Simplify right side
    691.79x = 423,451.26
  5. Step 5: Solve for x
    x = 423,451.26/691.79
  6. Step 6: Final answer
    x = 612.11

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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.