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Finding the Fourth Proportional to 5,724.16, 7,899.60 and 4,480

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Solution

The fourth proportional to 5,724.16, 7,899.60 and 4,480 is: 6,182.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,724.16 : 7,899.60 = 4,480 : x
  2. Step 2: Convert to fraction form
    5,724.16/7,899.60 = 4,480/x
  3. Step 3: Cross multiply
    5,724.16x = 7,899.60 × 4,480
  4. Step 4: Simplify right side
    5,724.16x = 35,390,208
  5. Step 5: Solve for x
    x = 35,390,208/5,724.16
  6. Step 6: Final answer
    x = 6,182.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.