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Finding the Fourth Proportional to 760.71, 1,135.56 and 668.44

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Solution

The fourth proportional to 760.71, 1,135.56 and 668.44 is: 997.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.71 : 1,135.56 = 668.44 : x
  2. Step 2: Convert to fraction form
    760.71/1,135.56 = 668.44/x
  3. Step 3: Cross multiply
    760.71x = 1,135.56 × 668.44
  4. Step 4: Simplify right side
    760.71x = 759,051.80
  5. Step 5: Solve for x
    x = 759,051.80/760.71
  6. Step 6: Final answer
    x = 997.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.