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Finding the Fourth Proportional to 691.14, 953.58 and 411.24

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Solution

The fourth proportional to 691.14, 953.58 and 411.24 is: 567.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.14 : 953.58 = 411.24 : x
  2. Step 2: Convert to fraction form
    691.14/953.58 = 411.24/x
  3. Step 3: Cross multiply
    691.14x = 953.58 × 411.24
  4. Step 4: Simplify right side
    691.14x = 392,150.24
  5. Step 5: Solve for x
    x = 392,150.24/691.14
  6. Step 6: Final answer
    x = 567.40

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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.