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Finding the Fourth Proportional to 5,639.50, 8,459.10 and 1,479.40

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Solution

The fourth proportional to 5,639.50, 8,459.10 and 1,479.40 is: 2,219.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.50 : 8,459.10 = 1,479.40 : x
  2. Step 2: Convert to fraction form
    5,639.50/8,459.10 = 1,479.40/x
  3. Step 3: Cross multiply
    5,639.50x = 8,459.10 × 1,479.40
  4. Step 4: Simplify right side
    5,639.50x = 12,514,392.54
  5. Step 5: Solve for x
    x = 12,514,392.54/5,639.50
  6. Step 6: Final answer
    x = 2,219.06

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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.