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Finding the Fourth Proportional to 818.88, 1,133.01 and 714.18

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Solution

The fourth proportional to 818.88, 1,133.01 and 714.18 is: 988.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.88 : 1,133.01 = 714.18 : x
  2. Step 2: Convert to fraction form
    818.88/1,133.01 = 714.18/x
  3. Step 3: Cross multiply
    818.88x = 1,133.01 × 714.18
  4. Step 4: Simplify right side
    818.88x = 809,173.08
  5. Step 5: Solve for x
    x = 809,173.08/818.88
  6. Step 6: Final answer
    x = 988.15

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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.