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Finding the Fourth Proportional to 4,723.76, 7,117.16 and 4,279.58

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Solution

The fourth proportional to 4,723.76, 7,117.16 and 4,279.58 is: 6,447.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,723.76 : 7,117.16 = 4,279.58 : x
  2. Step 2: Convert to fraction form
    4,723.76/7,117.16 = 4,279.58/x
  3. Step 3: Cross multiply
    4,723.76x = 7,117.16 × 4,279.58
  4. Step 4: Simplify right side
    4,723.76x = 30,458,455.59
  5. Step 5: Solve for x
    x = 30,458,455.59/4,723.76
  6. Step 6: Final answer
    x = 6,447.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.