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Finding the Fourth Proportional to 711.68, 981.96 and 416.84

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Solution

The fourth proportional to 711.68, 981.96 and 416.84 is: 575.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.68 : 981.96 = 416.84 : x
  2. Step 2: Convert to fraction form
    711.68/981.96 = 416.84/x
  3. Step 3: Cross multiply
    711.68x = 981.96 × 416.84
  4. Step 4: Simplify right side
    711.68x = 409,315.30
  5. Step 5: Solve for x
    x = 409,315.30/711.68
  6. Step 6: Final answer
    x = 575.14

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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.