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Finding the Fourth Proportional to 533.86, 736.43 and 312.77

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Solution

The fourth proportional to 533.86, 736.43 and 312.77 is: 431.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.86 : 736.43 = 312.77 : x
  2. Step 2: Convert to fraction form
    533.86/736.43 = 312.77/x
  3. Step 3: Cross multiply
    533.86x = 736.43 × 312.77
  4. Step 4: Simplify right side
    533.86x = 230,329.81
  5. Step 5: Solve for x
    x = 230,329.81/533.86
  6. Step 6: Final answer
    x = 431.44

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Find fourth proportional to 266.93, 368.21 and 156.38
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Double scale
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1.5x scale

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.