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Finding the Fourth Proportional to 704.80, 1,052.02 and 621.66

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Solution

The fourth proportional to 704.80, 1,052.02 and 621.66 is: 927.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.80 : 1,052.02 = 621.66 : x
  2. Step 2: Convert to fraction form
    704.80/1,052.02 = 621.66/x
  3. Step 3: Cross multiply
    704.80x = 1,052.02 × 621.66
  4. Step 4: Simplify right side
    704.80x = 653,998.75
  5. Step 5: Solve for x
    x = 653,998.75/704.80
  6. Step 6: Final answer
    x = 927.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.