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Finding the Fourth Proportional to 4,679.76, 6,458.76 and 2,689.92

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Solution

The fourth proportional to 4,679.76, 6,458.76 and 2,689.92 is: 3,712.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,679.76 : 6,458.76 = 2,689.92 : x
  2. Step 2: Convert to fraction form
    4,679.76/6,458.76 = 2,689.92/x
  3. Step 3: Cross multiply
    4,679.76x = 6,458.76 × 2,689.92
  4. Step 4: Simplify right side
    4,679.76x = 17,373,547.70
  5. Step 5: Solve for x
    x = 17,373,547.70/4,679.76
  6. Step 6: Final answer
    x = 3,712.49

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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.