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Finding the Fourth Proportional to 468.75, 647.15 and 313.77

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Solution

The fourth proportional to 468.75, 647.15 and 313.77 is: 433.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.75 : 647.15 = 313.77 : x
  2. Step 2: Convert to fraction form
    468.75/647.15 = 313.77/x
  3. Step 3: Cross multiply
    468.75x = 647.15 × 313.77
  4. Step 4: Simplify right side
    468.75x = 203,054.69
  5. Step 5: Solve for x
    x = 203,054.69/468.75
  6. Step 6: Final answer
    x = 433.18

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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.