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Finding the Fourth Proportional to 4,720.48, 7,079.78 and 4,486.30

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Solution

The fourth proportional to 4,720.48, 7,079.78 and 4,486.30 is: 6,728.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,720.48 : 7,079.78 = 4,486.30 : x
  2. Step 2: Convert to fraction form
    4,720.48/7,079.78 = 4,486.30/x
  3. Step 3: Cross multiply
    4,720.48x = 7,079.78 × 4,486.30
  4. Step 4: Simplify right side
    4,720.48x = 31,762,017.01
  5. Step 5: Solve for x
    x = 31,762,017.01/4,720.48
  6. Step 6: Final answer
    x = 6,728.56

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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.