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Finding the Fourth Proportional to 714.55, 986.12 and 504.80

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Solution

The fourth proportional to 714.55, 986.12 and 504.80 is: 696.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.55 : 986.12 = 504.80 : x
  2. Step 2: Convert to fraction form
    714.55/986.12 = 504.80/x
  3. Step 3: Cross multiply
    714.55x = 986.12 × 504.80
  4. Step 4: Simplify right side
    714.55x = 497,793.38
  5. Step 5: Solve for x
    x = 497,793.38/714.55
  6. Step 6: Final answer
    x = 696.65

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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.