Home / 1,778.64-2,666.79-945.20

Finding the Fourth Proportional to 1,778.64, 2,666.79 and 945.20

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Solution

The fourth proportional to 1,778.64, 2,666.79 and 945.20 is: 1,417.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.64 : 2,666.79 = 945.20 : x
  2. Step 2: Convert to fraction form
    1,778.64/2,666.79 = 945.20/x
  3. Step 3: Cross multiply
    1,778.64x = 2,666.79 × 945.20
  4. Step 4: Simplify right side
    1,778.64x = 2,520,636.57
  5. Step 5: Solve for x
    x = 2,520,636.57/1,778.64
  6. Step 6: Final answer
    x = 1,417.17

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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.