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Finding the Fourth Proportional to 760.35, 1,049.30 and 445.80

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Solution

The fourth proportional to 760.35, 1,049.30 and 445.80 is: 615.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.35 : 1,049.30 = 445.80 : x
  2. Step 2: Convert to fraction form
    760.35/1,049.30 = 445.80/x
  3. Step 3: Cross multiply
    760.35x = 1,049.30 × 445.80
  4. Step 4: Simplify right side
    760.35x = 467,777.94
  5. Step 5: Solve for x
    x = 467,777.94/760.35
  6. Step 6: Final answer
    x = 615.21

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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.