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Finding the Fourth Proportional to 1,069.53, 1,475.31 and 671.16

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Solution

The fourth proportional to 1,069.53, 1,475.31 and 671.16 is: 925.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.53 : 1,475.31 = 671.16 : x
  2. Step 2: Convert to fraction form
    1,069.53/1,475.31 = 671.16/x
  3. Step 3: Cross multiply
    1,069.53x = 1,475.31 × 671.16
  4. Step 4: Simplify right side
    1,069.53x = 990,169.06
  5. Step 5: Solve for x
    x = 990,169.06/1,069.53
  6. Step 6: Final answer
    x = 925.80

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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.