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Finding the Fourth Proportional to 711.76, 982.32 and 417.18

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Solution

The fourth proportional to 711.76, 982.32 and 417.18 is: 575.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.76 : 982.32 = 417.18 : x
  2. Step 2: Convert to fraction form
    711.76/982.32 = 417.18/x
  3. Step 3: Cross multiply
    711.76x = 982.32 × 417.18
  4. Step 4: Simplify right side
    711.76x = 409,804.26
  5. Step 5: Solve for x
    x = 409,804.26/711.76
  6. Step 6: Final answer
    x = 575.76

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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.