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Finding the Fourth Proportional to 1,778, 2,663.16 and 1,117.64

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Solution

The fourth proportional to 1,778, 2,663.16 and 1,117.64 is: 1,674.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778 : 2,663.16 = 1,117.64 : x
  2. Step 2: Convert to fraction form
    1,778/2,663.16 = 1,117.64/x
  3. Step 3: Cross multiply
    1,778x = 2,663.16 × 1,117.64
  4. Step 4: Simplify right side
    1,778x = 2,976,454.14
  5. Step 5: Solve for x
    x = 2,976,454.14/1,778
  6. Step 6: Final answer
    x = 1,674.05

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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.