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Finding the Fourth Proportional to 772.34, 1,064.76 and 605.48

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Solution

The fourth proportional to 772.34, 1,064.76 and 605.48 is: 834.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.34 : 1,064.76 = 605.48 : x
  2. Step 2: Convert to fraction form
    772.34/1,064.76 = 605.48/x
  3. Step 3: Cross multiply
    772.34x = 1,064.76 × 605.48
  4. Step 4: Simplify right side
    772.34x = 644,690.88
  5. Step 5: Solve for x
    x = 644,690.88/772.34
  6. Step 6: Final answer
    x = 834.72

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1.5x scale

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.