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Finding the Fourth Proportional to 1,120.82, 1,681.41 and 471.65

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Solution

The fourth proportional to 1,120.82, 1,681.41 and 471.65 is: 707.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.82 : 1,681.41 = 471.65 : x
  2. Step 2: Convert to fraction form
    1,120.82/1,681.41 = 471.65/x
  3. Step 3: Cross multiply
    1,120.82x = 1,681.41 × 471.65
  4. Step 4: Simplify right side
    1,120.82x = 793,037.03
  5. Step 5: Solve for x
    x = 793,037.03/1,120.82
  6. Step 6: Final answer
    x = 707.55

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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.