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Finding the Fourth Proportional to 533.86, 736.61 and 312.77

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Solution

The fourth proportional to 533.86, 736.61 and 312.77 is: 431.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.86 : 736.61 = 312.77 : x
  2. Step 2: Convert to fraction form
    533.86/736.61 = 312.77/x
  3. Step 3: Cross multiply
    533.86x = 736.61 × 312.77
  4. Step 4: Simplify right side
    533.86x = 230,389.51
  5. Step 5: Solve for x
    x = 230,389.51/533.86
  6. Step 6: Final answer
    x = 431.55

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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.