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Finding the Fourth Proportional to 1,098.19, 1,514.09 and 783.82

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Solution

The fourth proportional to 1,098.19, 1,514.09 and 783.82 is: 1,080.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.19 : 1,514.09 = 783.82 : x
  2. Step 2: Convert to fraction form
    1,098.19/1,514.09 = 783.82/x
  3. Step 3: Cross multiply
    1,098.19x = 1,514.09 × 783.82
  4. Step 4: Simplify right side
    1,098.19x = 1,186,762.53
  5. Step 5: Solve for x
    x = 1,186,762.53/1,098.19
  6. Step 6: Final answer
    x = 1,080.66

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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.