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Finding the Fourth Proportional to 877.81, 1,211.64 and 523.99

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Solution

The fourth proportional to 877.81, 1,211.64 and 523.99 is: 723.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.81 : 1,211.64 = 523.99 : x
  2. Step 2: Convert to fraction form
    877.81/1,211.64 = 523.99/x
  3. Step 3: Cross multiply
    877.81x = 1,211.64 × 523.99
  4. Step 4: Simplify right side
    877.81x = 634,887.24
  5. Step 5: Solve for x
    x = 634,887.24/877.81
  6. Step 6: Final answer
    x = 723.26

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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.