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Finding the Fourth Proportional to 661.04, 991.10 and 295.80

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Solution

The fourth proportional to 661.04, 991.10 and 295.80 is: 443.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.04 : 991.10 = 295.80 : x
  2. Step 2: Convert to fraction form
    661.04/991.10 = 295.80/x
  3. Step 3: Cross multiply
    661.04x = 991.10 × 295.80
  4. Step 4: Simplify right side
    661.04x = 293,167.38
  5. Step 5: Solve for x
    x = 293,167.38/661.04
  6. Step 6: Final answer
    x = 443.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.