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Finding the Fourth Proportional to 2,143.60, 2,957.48 and 1,259.62

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Solution

The fourth proportional to 2,143.60, 2,957.48 and 1,259.62 is: 1,737.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.60 : 2,957.48 = 1,259.62 : x
  2. Step 2: Convert to fraction form
    2,143.60/2,957.48 = 1,259.62/x
  3. Step 3: Cross multiply
    2,143.60x = 2,957.48 × 1,259.62
  4. Step 4: Simplify right side
    2,143.60x = 3,725,300.96
  5. Step 5: Solve for x
    x = 3,725,300.96/2,143.60
  6. Step 6: Final answer
    x = 1,737.87

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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.