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Finding the Fourth Proportional to 691.36, 953.06 and 682.08

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Solution

The fourth proportional to 691.36, 953.06 and 682.08 is: 940.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.36 : 953.06 = 682.08 : x
  2. Step 2: Convert to fraction form
    691.36/953.06 = 682.08/x
  3. Step 3: Cross multiply
    691.36x = 953.06 × 682.08
  4. Step 4: Simplify right side
    691.36x = 650,063.16
  5. Step 5: Solve for x
    x = 650,063.16/691.36
  6. Step 6: Final answer
    x = 940.27

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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.