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Finding the Fourth Proportional to 703.48, 1,055.22 and 425.89

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Solution

The fourth proportional to 703.48, 1,055.22 and 425.89 is: 638.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.48 : 1,055.22 = 425.89 : x
  2. Step 2: Convert to fraction form
    703.48/1,055.22 = 425.89/x
  3. Step 3: Cross multiply
    703.48x = 1,055.22 × 425.89
  4. Step 4: Simplify right side
    703.48x = 449,407.65
  5. Step 5: Solve for x
    x = 449,407.65/703.48
  6. Step 6: Final answer
    x = 638.84

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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.