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Finding the Fourth Proportional to 514.36, 709.60 and 307.36

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Solution

The fourth proportional to 514.36, 709.60 and 307.36 is: 424.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.36 : 709.60 = 307.36 : x
  2. Step 2: Convert to fraction form
    514.36/709.60 = 307.36/x
  3. Step 3: Cross multiply
    514.36x = 709.60 × 307.36
  4. Step 4: Simplify right side
    514.36x = 218,102.66
  5. Step 5: Solve for x
    x = 218,102.66/514.36
  6. Step 6: Final answer
    x = 424.03

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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.