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Finding the Fourth Proportional to 946.76, 1,420.34 and 556.56

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Solution

The fourth proportional to 946.76, 1,420.34 and 556.56 is: 834.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.76 : 1,420.34 = 556.56 : x
  2. Step 2: Convert to fraction form
    946.76/1,420.34 = 556.56/x
  3. Step 3: Cross multiply
    946.76x = 1,420.34 × 556.56
  4. Step 4: Simplify right side
    946.76x = 790,505.64
  5. Step 5: Solve for x
    x = 790,505.64/946.76
  6. Step 6: Final answer
    x = 834.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.