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Finding the Fourth Proportional to 691.81, 953.79 and 682.63

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Solution

The fourth proportional to 691.81, 953.79 and 682.63 is: 941.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.81 : 953.79 = 682.63 : x
  2. Step 2: Convert to fraction form
    691.81/953.79 = 682.63/x
  3. Step 3: Cross multiply
    691.81x = 953.79 × 682.63
  4. Step 4: Simplify right side
    691.81x = 651,085.67
  5. Step 5: Solve for x
    x = 651,085.67/691.81
  6. Step 6: Final answer
    x = 941.13

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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.