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Finding the Fourth Proportional to 3,159.88, 4,739.10 and 1,429

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Solution

The fourth proportional to 3,159.88, 4,739.10 and 1,429 is: 2,143.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,159.88 : 4,739.10 = 1,429 : x
  2. Step 2: Convert to fraction form
    3,159.88/4,739.10 = 1,429/x
  3. Step 3: Cross multiply
    3,159.88x = 4,739.10 × 1,429
  4. Step 4: Simplify right side
    3,159.88x = 6,772,173.90
  5. Step 5: Solve for x
    x = 6,772,173.90/3,159.88
  6. Step 6: Final answer
    x = 2,143.17

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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.