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Finding the Fourth Proportional to 1,818.66, 2,509.76 and 1,072.64

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Solution

The fourth proportional to 1,818.66, 2,509.76 and 1,072.64 is: 1,480.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.66 : 2,509.76 = 1,072.64 : x
  2. Step 2: Convert to fraction form
    1,818.66/2,509.76 = 1,072.64/x
  3. Step 3: Cross multiply
    1,818.66x = 2,509.76 × 1,072.64
  4. Step 4: Simplify right side
    1,818.66x = 2,692,068.97
  5. Step 5: Solve for x
    x = 2,692,068.97/1,818.66
  6. Step 6: Final answer
    x = 1,480.25

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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.