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Finding the Fourth Proportional to 734.21, 1,013.03 and 666.14

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Solution

The fourth proportional to 734.21, 1,013.03 and 666.14 is: 919.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.21 : 1,013.03 = 666.14 : x
  2. Step 2: Convert to fraction form
    734.21/1,013.03 = 666.14/x
  3. Step 3: Cross multiply
    734.21x = 1,013.03 × 666.14
  4. Step 4: Simplify right side
    734.21x = 674,814.74
  5. Step 5: Solve for x
    x = 674,814.74/734.21
  6. Step 6: Final answer
    x = 919.11

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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.