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Finding the Fourth Proportional to 691.44, 955.44 and 675.60

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Solution

The fourth proportional to 691.44, 955.44 and 675.60 is: 933.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.44 : 955.44 = 675.60 : x
  2. Step 2: Convert to fraction form
    691.44/955.44 = 675.60/x
  3. Step 3: Cross multiply
    691.44x = 955.44 × 675.60
  4. Step 4: Simplify right side
    691.44x = 645,495.26
  5. Step 5: Solve for x
    x = 645,495.26/691.44
  6. Step 6: Final answer
    x = 933.55

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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.