Home / 1,218.63-1,680.29-1,152.96

Finding the Fourth Proportional to 1,218.63, 1,680.29 and 1,152.96

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Solution

The fourth proportional to 1,218.63, 1,680.29 and 1,152.96 is: 1,589.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.63 : 1,680.29 = 1,152.96 : x
  2. Step 2: Convert to fraction form
    1,218.63/1,680.29 = 1,152.96/x
  3. Step 3: Cross multiply
    1,218.63x = 1,680.29 × 1,152.96
  4. Step 4: Simplify right side
    1,218.63x = 1,937,301.39
  5. Step 5: Solve for x
    x = 1,937,301.39/1,218.63
  6. Step 6: Final answer
    x = 1,589.74

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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.