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Finding the Fourth Proportional to 6,479.90, 9,719.85 and 4,406.30

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Solution

The fourth proportional to 6,479.90, 9,719.85 and 4,406.30 is: 6,609.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,479.90 : 9,719.85 = 4,406.30 : x
  2. Step 2: Convert to fraction form
    6,479.90/9,719.85 = 4,406.30/x
  3. Step 3: Cross multiply
    6,479.90x = 9,719.85 × 4,406.30
  4. Step 4: Simplify right side
    6,479.90x = 42,828,575.06
  5. Step 5: Solve for x
    x = 42,828,575.06/6,479.90
  6. Step 6: Final answer
    x = 6,609.45

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Similar ratio
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1.5x scale

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.