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Finding the Fourth Proportional to 714.03, 985.14 and 493.53

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Solution

The fourth proportional to 714.03, 985.14 and 493.53 is: 680.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.03 : 985.14 = 493.53 : x
  2. Step 2: Convert to fraction form
    714.03/985.14 = 493.53/x
  3. Step 3: Cross multiply
    714.03x = 985.14 × 493.53
  4. Step 4: Simplify right side
    714.03x = 486,196.14
  5. Step 5: Solve for x
    x = 486,196.14/714.03
  6. Step 6: Final answer
    x = 680.92

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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.