Home / 4,279.80-6,420.35-1,505.98

Finding the Fourth Proportional to 4,279.80, 6,420.35 and 1,505.98

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Solution

The fourth proportional to 4,279.80, 6,420.35 and 1,505.98 is: 2,259.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,279.80 : 6,420.35 = 1,505.98 : x
  2. Step 2: Convert to fraction form
    4,279.80/6,420.35 = 1,505.98/x
  3. Step 3: Cross multiply
    4,279.80x = 6,420.35 × 1,505.98
  4. Step 4: Simplify right side
    4,279.80x = 9,668,918.69
  5. Step 5: Solve for x
    x = 9,668,918.69/4,279.80
  6. Step 6: Final answer
    x = 2,259.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.