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Finding the Fourth Proportional to 885.99, 1,329.62 and 655.49

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Solution

The fourth proportional to 885.99, 1,329.62 and 655.49 is: 983.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.99 : 1,329.62 = 655.49 : x
  2. Step 2: Convert to fraction form
    885.99/1,329.62 = 655.49/x
  3. Step 3: Cross multiply
    885.99x = 1,329.62 × 655.49
  4. Step 4: Simplify right side
    885.99x = 871,552.66
  5. Step 5: Solve for x
    x = 871,552.66/885.99
  6. Step 6: Final answer
    x = 983.71

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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.