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Finding the Fourth Proportional to 704.91, 1,055.54 and 486.21

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Solution

The fourth proportional to 704.91, 1,055.54 and 486.21 is: 728.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.91 : 1,055.54 = 486.21 : x
  2. Step 2: Convert to fraction form
    704.91/1,055.54 = 486.21/x
  3. Step 3: Cross multiply
    704.91x = 1,055.54 × 486.21
  4. Step 4: Simplify right side
    704.91x = 513,219.28
  5. Step 5: Solve for x
    x = 513,219.28/704.91
  6. Step 6: Final answer
    x = 728.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.