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Finding the Fourth Proportional to 772.14, 1,065.57 and 473.35

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Solution

The fourth proportional to 772.14, 1,065.57 and 473.35 is: 653.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.14 : 1,065.57 = 473.35 : x
  2. Step 2: Convert to fraction form
    772.14/1,065.57 = 473.35/x
  3. Step 3: Cross multiply
    772.14x = 1,065.57 × 473.35
  4. Step 4: Simplify right side
    772.14x = 504,387.56
  5. Step 5: Solve for x
    x = 504,387.56/772.14
  6. Step 6: Final answer
    x = 653.23

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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.