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Finding the Fourth Proportional to 4,678.31, 7,015.14 and 2,899.55

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Solution

The fourth proportional to 4,678.31, 7,015.14 and 2,899.55 is: 4,347.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,678.31 : 7,015.14 = 2,899.55 : x
  2. Step 2: Convert to fraction form
    4,678.31/7,015.14 = 2,899.55/x
  3. Step 3: Cross multiply
    4,678.31x = 7,015.14 × 2,899.55
  4. Step 4: Simplify right side
    4,678.31x = 20,340,714.11
  5. Step 5: Solve for x
    x = 20,340,714.11/4,678.31
  6. Step 6: Final answer
    x = 4,347.88

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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.