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Finding the Fourth Proportional to 714, 985.26 and 419.24

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Solution

The fourth proportional to 714, 985.26 and 419.24 is: 578.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    714 : 985.26 = 419.24 : x
  2. Step 2: Convert to fraction form
    714/985.26 = 419.24/x
  3. Step 3: Cross multiply
    714x = 985.26 × 419.24
  4. Step 4: Simplify right side
    714x = 413,060.40
  5. Step 5: Solve for x
    x = 413,060.40/714
  6. Step 6: Final answer
    x = 578.52

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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.