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Finding the Fourth Proportional to 5,751.28, 8,628.72 and 2,421.28

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Solution

The fourth proportional to 5,751.28, 8,628.72 and 2,421.28 is: 3,632.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,751.28 : 8,628.72 = 2,421.28 : x
  2. Step 2: Convert to fraction form
    5,751.28/8,628.72 = 2,421.28/x
  3. Step 3: Cross multiply
    5,751.28x = 8,628.72 × 2,421.28
  4. Step 4: Simplify right side
    5,751.28x = 20,892,547.16
  5. Step 5: Solve for x
    x = 20,892,547.16/5,751.28
  6. Step 6: Final answer
    x = 3,632.68

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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.