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Finding the Fourth Proportional to 704.88, 974.16 and 623.88

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Solution

The fourth proportional to 704.88, 974.16 and 623.88 is: 862.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.88 : 974.16 = 623.88 : x
  2. Step 2: Convert to fraction form
    704.88/974.16 = 623.88/x
  3. Step 3: Cross multiply
    704.88x = 974.16 × 623.88
  4. Step 4: Simplify right side
    704.88x = 607,758.94
  5. Step 5: Solve for x
    x = 607,758.94/704.88
  6. Step 6: Final answer
    x = 862.22

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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.