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Finding the Fourth Proportional to 669.98, 1,004.59 and 231.02

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Solution

The fourth proportional to 669.98, 1,004.59 and 231.02 is: 346.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.98 : 1,004.59 = 231.02 : x
  2. Step 2: Convert to fraction form
    669.98/1,004.59 = 231.02/x
  3. Step 3: Cross multiply
    669.98x = 1,004.59 × 231.02
  4. Step 4: Simplify right side
    669.98x = 232,079.23
  5. Step 5: Solve for x
    x = 232,079.23/669.98
  6. Step 6: Final answer
    x = 346.40

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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.