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Finding the Fourth Proportional to 5,639.54, 8,459.10 and 1,479.51

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Solution

The fourth proportional to 5,639.54, 8,459.10 and 1,479.51 is: 2,219.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.54 : 8,459.10 = 1,479.51 : x
  2. Step 2: Convert to fraction form
    5,639.54/8,459.10 = 1,479.51/x
  3. Step 3: Cross multiply
    5,639.54x = 8,459.10 × 1,479.51
  4. Step 4: Simplify right side
    5,639.54x = 12,515,323.04
  5. Step 5: Solve for x
    x = 12,515,323.04/5,639.54
  6. Step 6: Final answer
    x = 2,219.21

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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.