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Finding the Fourth Proportional to 818.84, 1,129.64 and 546.06

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Solution

The fourth proportional to 818.84, 1,129.64 and 546.06 is: 753.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.84 : 1,129.64 = 546.06 : x
  2. Step 2: Convert to fraction form
    818.84/1,129.64 = 546.06/x
  3. Step 3: Cross multiply
    818.84x = 1,129.64 × 546.06
  4. Step 4: Simplify right side
    818.84x = 616,851.22
  5. Step 5: Solve for x
    x = 616,851.22/818.84
  6. Step 6: Final answer
    x = 753.32

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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.