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Finding the Fourth Proportional to 668.01, 1,001.84 and 257.16

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Solution

The fourth proportional to 668.01, 1,001.84 and 257.16 is: 385.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.01 : 1,001.84 = 257.16 : x
  2. Step 2: Convert to fraction form
    668.01/1,001.84 = 257.16/x
  3. Step 3: Cross multiply
    668.01x = 1,001.84 × 257.16
  4. Step 4: Simplify right side
    668.01x = 257,631.89
  5. Step 5: Solve for x
    x = 257,631.89/668.01
  6. Step 6: Final answer
    x = 385.67

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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.