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Finding the Fourth Proportional to 711.79, 982.25 and 397.07

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Solution

The fourth proportional to 711.79, 982.25 and 397.07 is: 547.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.79 : 982.25 = 397.07 : x
  2. Step 2: Convert to fraction form
    711.79/982.25 = 397.07/x
  3. Step 3: Cross multiply
    711.79x = 982.25 × 397.07
  4. Step 4: Simplify right side
    711.79x = 390,023.05
  5. Step 5: Solve for x
    x = 390,023.05/711.79
  6. Step 6: Final answer
    x = 547.94

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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.