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Finding the Fourth Proportional to 506.77, 699.16 and 320.19

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Solution

The fourth proportional to 506.77, 699.16 and 320.19 is: 441.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.77 : 699.16 = 320.19 : x
  2. Step 2: Convert to fraction form
    506.77/699.16 = 320.19/x
  3. Step 3: Cross multiply
    506.77x = 699.16 × 320.19
  4. Step 4: Simplify right side
    506.77x = 223,863.27
  5. Step 5: Solve for x
    x = 223,863.27/506.77
  6. Step 6: Final answer
    x = 441.75

Related Problems

Find fourth proportional to 253.38, 349.58 and 160.10
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.