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Finding the Fourth Proportional to 784.05, 1,082.02 and 528.89

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Solution

The fourth proportional to 784.05, 1,082.02 and 528.89 is: 729.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.05 : 1,082.02 = 528.89 : x
  2. Step 2: Convert to fraction form
    784.05/1,082.02 = 528.89/x
  3. Step 3: Cross multiply
    784.05x = 1,082.02 × 528.89
  4. Step 4: Simplify right side
    784.05x = 572,262.83
  5. Step 5: Solve for x
    x = 572,262.83/784.05
  6. Step 6: Final answer
    x = 729.88

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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.