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Finding the Fourth Proportional to 711.02, 980.72 and 431.06

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Solution

The fourth proportional to 711.02, 980.72 and 431.06 is: 594.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.02 : 980.72 = 431.06 : x
  2. Step 2: Convert to fraction form
    711.02/980.72 = 431.06/x
  3. Step 3: Cross multiply
    711.02x = 980.72 × 431.06
  4. Step 4: Simplify right side
    711.02x = 422,749.16
  5. Step 5: Solve for x
    x = 422,749.16/711.02
  6. Step 6: Final answer
    x = 594.57

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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.