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Finding the Fourth Proportional to 714.22, 985.17 and 419.47

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Solution

The fourth proportional to 714.22, 985.17 and 419.47 is: 578.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.22 : 985.17 = 419.47 : x
  2. Step 2: Convert to fraction form
    714.22/985.17 = 419.47/x
  3. Step 3: Cross multiply
    714.22x = 985.17 × 419.47
  4. Step 4: Simplify right side
    714.22x = 413,249.26
  5. Step 5: Solve for x
    x = 413,249.26/714.22
  6. Step 6: Final answer
    x = 578.60

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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.