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Finding the Fourth Proportional to 517.84, 776.76 and 389.68

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Solution

The fourth proportional to 517.84, 776.76 and 389.68 is: 584.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.84 : 776.76 = 389.68 : x
  2. Step 2: Convert to fraction form
    517.84/776.76 = 389.68/x
  3. Step 3: Cross multiply
    517.84x = 776.76 × 389.68
  4. Step 4: Simplify right side
    517.84x = 302,687.84
  5. Step 5: Solve for x
    x = 302,687.84/517.84
  6. Step 6: Final answer
    x = 584.52

Related Problems

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.