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Finding the Fourth Proportional to 591.45, 816.20 and 342.77

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Solution

The fourth proportional to 591.45, 816.20 and 342.77 is: 473.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.45 : 816.20 = 342.77 : x
  2. Step 2: Convert to fraction form
    591.45/816.20 = 342.77/x
  3. Step 3: Cross multiply
    591.45x = 816.20 × 342.77
  4. Step 4: Simplify right side
    591.45x = 279,764.36
  5. Step 5: Solve for x
    x = 279,764.36/591.45
  6. Step 6: Final answer
    x = 473.02

Related Problems

Find fourth proportional to 295.72, 408.10 and 171.38
Half scale
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Double scale
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Similar ratio
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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.