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Finding the Fourth Proportional to 5,590.84, 7,751.21 and 5,279.80

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Solution

The fourth proportional to 5,590.84, 7,751.21 and 5,279.80 is: 7,319.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,590.84 : 7,751.21 = 5,279.80 : x
  2. Step 2: Convert to fraction form
    5,590.84/7,751.21 = 5,279.80/x
  3. Step 3: Cross multiply
    5,590.84x = 7,751.21 × 5,279.80
  4. Step 4: Simplify right side
    5,590.84x = 40,924,838.56
  5. Step 5: Solve for x
    x = 40,924,838.56/5,590.84
  6. Step 6: Final answer
    x = 7,319.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.