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Finding the Fourth Proportional to 1,416.96, 1,957.55 and 1,209.29

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Solution

The fourth proportional to 1,416.96, 1,957.55 and 1,209.29 is: 1,670.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.96 : 1,957.55 = 1,209.29 : x
  2. Step 2: Convert to fraction form
    1,416.96/1,957.55 = 1,209.29/x
  3. Step 3: Cross multiply
    1,416.96x = 1,957.55 × 1,209.29
  4. Step 4: Simplify right side
    1,416.96x = 2,367,229.81
  5. Step 5: Solve for x
    x = 2,367,229.81/1,416.96
  6. Step 6: Final answer
    x = 1,670.64

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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.