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Finding the Fourth Proportional to 772.08, 1,064.39 and 653.58

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Solution

The fourth proportional to 772.08, 1,064.39 and 653.58 is: 901.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.08 : 1,064.39 = 653.58 : x
  2. Step 2: Convert to fraction form
    772.08/1,064.39 = 653.58/x
  3. Step 3: Cross multiply
    772.08x = 1,064.39 × 653.58
  4. Step 4: Simplify right side
    772.08x = 695,660.75
  5. Step 5: Solve for x
    x = 695,660.75/772.08
  6. Step 6: Final answer
    x = 901.03

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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.