Home / 1,214.69-1,818.26-981.63

Finding the Fourth Proportional to 1,214.69, 1,818.26 and 981.63

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Solution

The fourth proportional to 1,214.69, 1,818.26 and 981.63 is: 1,469.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.69 : 1,818.26 = 981.63 : x
  2. Step 2: Convert to fraction form
    1,214.69/1,818.26 = 981.63/x
  3. Step 3: Cross multiply
    1,214.69x = 1,818.26 × 981.63
  4. Step 4: Simplify right side
    1,214.69x = 1,784,857.34
  5. Step 5: Solve for x
    x = 1,784,857.34/1,214.69
  6. Step 6: Final answer
    x = 1,469.40

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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.